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CORSAIR EX400U SURVIVOR vs Sandisk Extreme Portable SSD (V3)

A

Product A: CORSAIR

EX400U SURVIVOR

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B

Product B: Sandisk

Extreme Portable SSD (V3)

28 of 63 known

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Only differences

ACORSAIR EX400U SURVIVOR

BSandisk Extreme Portable SSD (V3)

General

6 of 9 differ

Series

EX400U4Maker product pagecorsair.com/us/en/explorer/diy-builder/storage/corsair-ex400u-survivor-everything-you-need-to-knowRead 15 October 2026Blog compares the drive with the original EX400U and calls the Survivor the latest addition to the portable SSD lineup

Extreme3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026Maker line name is SANDISK Extreme, page title SANDISK Extreme Portable SSD (V3)

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

CSSD-EX400US1TB, CSSD-EX400US2TB, CSSD-EX400US4TB1Maker product pagecorsair.com/us/en/p/data-storage/cssd-ex400us2tb/ex400u-survivor-2tb-usb4-external-ssd-cssd-ex400us2tbRead 15 October 2026SKU CSSD-EX400US2TB on the 2TB page. The capacity selector offers 1 TB, 2 TB and 4 TB, each with its own page and SKU (CSSD-EX400US1TB, CSSD-EX400US4TB). The 1TB and 4TB pages showed Out Of Stock on 2026-10-15

SDSSDE70-500G-G25, SDSSDE70-500G-G25B, SDSSDE70-1T00-G25, SDSSDE70-1T00-G25B, SDSSDE70-2T00-G25, SDSSDE70-2T00-G25B, SDSSDE70-4T00-G252Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-monterey-blue-ssd.pdfRead 14 October 2026Model number and UPC table lists the Monterey Blue SKUs SDSSDE70-2T00-G25B, SDSSDE70-1T00-G25B and SDSSDE70-500G-G25B, region GLOBAL. The black SKUs are on the product page3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026Model Numbers table: black SDSSDE70-500G-G25, -1T00-G25, -2T00-G25, -4T00-G25. Monterey Blue SDSSDE70-500G-G25B, -1T00-G25B and -2T00-G25B

GTIN / EAN

Not available

619659235291, 619659238568, 619659223151, 619659238575, 619659223199, 619659238582, 6196592232362Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-monterey-blue-ssd.pdfRead 14 October 2026EAN column reads 0 619659 238582, 0 619659 238575 and 0 619659 238568. Stored as the 12-digit UPC. The black UPCs are on the product page data3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026UPCs in the page data: 619659235291 (500GB), 619659223151 (1TB), 619659223199 (2TB), 619659223236 (4TB) for black and 619659238568, 619659238575, 619659238582 for Monterey Blue

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

23 October 20255Press releasecorsair.com/newsroom/press-release/corsair-adds-rugged-performance-and-mobile-convenience-to-its-storage-portfolioRead 15 October 2026Press release dated 2025-10-23, announcing the EX400U SURVIVOR and the EX300U

24 February 20264Press releasesandisk.com/company/newsroom/press-releases/2026/2026-02-24-sandisk-introduces-next-generation-portable-ssd-portfolio-to-support-faster-more-demanding-workflows-and-ai-developed-contentRead 14 October 202624 February 2026

Status

Available1Maker product pagecorsair.com/us/en/p/data-storage/cssd-ex400us2tb/ex400u-survivor-2tb-usb4-external-ssd-cssd-ex400us2tbRead 15 October 20262TB page showed In Stock on 2026-10-155Press releasecorsair.com/newsroom/press-release/corsair-adds-rugged-performance-and-mobile-convenience-to-its-storage-portfolioRead 15 October 2026Available at launch. Corsair's store still lists the SKUs in 2026

Available3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026Product page lists Black and Monterey Blue SKUs for sale, with the Black 4TB as the only 4TB4Press releasesandisk.com/company/newsroom/press-releases/2026/2026-02-24-sandisk-introduces-next-generation-portable-ssd-portfolio-to-support-faster-more-demanding-workflows-and-ai-developed-contentRead 14 October 2026Available now and shipping globally

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

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Sandisk Extreme Portable SSD (V2)7Press releasesandisk.com/en-us/company/newsroom/press-releases/2026/2026-02-24-sandisk-introduces-next-generation-portable-ssd-portfolio-to-support-faster-more-demanding-workflows-and-ai-developed-contentRead 23 October 2026Sandisk says the new Extreme Portable SSD has nearly twice the speed of its predecessor.8Reviewtechradar.com/computing/storage-backup/the-sandisk-extreme-1tb-is-one-of-our-favorite-portable-rugged-ssds-ever-fast-sleek-and-now-with-a-usd60-discountRead 23 October 2026TechRadar says the newer Extreme Portable SSD at 2000 MB/s is a jump over the 1050 MB/s previous generation of the same drive.

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

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Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$254.996Press articlegdm.or.jp/pressrelease/2025/1024/609408Read 15 October 2026Japanese reprint of Corsair's 2025-10-23 announcement lists the US direct-sale prices in USD at launch: 1TB 144.99, 2TB 254.99, 4TB 409.99. Excl. sales tax. IT Home reports the same three prices. No EUR launch price was found. Base value is the 2TB7Press articleithome.com/0/891/958.htmRead 15 October 2026Chinese report of the same announcement: 144.99 / 254.99 / 409.99 USD for the three capacities, with a five-year warranty

$459.994Press releasesandisk.com/company/newsroom/press-releases/2026/2026-02-24-sandisk-introduces-next-generation-portable-ssd-portfolio-to-support-faster-more-demanding-workflows-and-ai-developed-contentRead 14 October 2026Pricing starting at $259.99 MSRP for 1TB, with 2TB and 4TB also offered. The 2TB and 4TB prices come from Digital Camera World5Press articledigitalcameraworld.com/cameras/ssds/sandisk-announces-its-fastest-ever-portable-ssdRead 14 October 2026Launch coverage: 1TB $259.99, 2TB $459.99 and 4TB $919.99, US prices before tax, available to buy at launch

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

€450.996Press articlephototrend.fr/en/2026/02/ssd-sandisk-portable-v3Read 14 October 2026Launch coverage on 25 February 2026: 1TB 260.99 EUR, 2TB 450.99 EUR and 4TB 889.99 EUR on the SanDisk store, including VAT. The article names no country. The French outlet is the only source found

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

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ColoursiThe maker's own colour names

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Black, Monterey Blue2Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-monterey-blue-ssd.pdfRead 14 October 2026Datasheet is for the Monterey Blue version. The black version has its own datasheet3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026SKU titles read Black and Monterey Blue

Form factoriPhysical size of the drive. External is any drive in its own case that connects by cable. A drive sold in two M.2 lengths is two products. Xbox expansion card is a card for the storage expansion slot of an Xbox Series console.

External1Maker product pagecorsair.com/us/en/p/data-storage/cssd-ex400us2tb/ex400u-survivor-2tb-usb4-external-ssd-cssd-ex400us2tbRead 15 October 2026

External1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-ssd.pdfRead 14 October 2026Form factor row reads External SSD - Portable SSD

CapacityiNominal capacity before formatting, in decimal GB. A published 1 TB is 1000 GB. A published 1024GB stays 1024. The marketed capacity is stored, not a raw or usable figure from the same table, such as OWC's 2048 GB total and 1920 GB usable for a 2.0TB drive.

1 TB, 2 TB, 4 TB1Maker product pagecorsair.com/us/en/p/data-storage/cssd-ex400us2tb/ex400u-survivor-2tb-usb4-external-ssd-cssd-ex400us2tbRead 15 October 2026Capacity selector offers 1 TB, 2 TB and 4 TB

500 GB, 1 TB, 2 TB, 4 TB1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-ssd.pdfRead 14 October 2026Available capacities row reads 4TB, 2TB, 1TB. The 500GB comes from the Monterey Blue datasheet and the product page. 1TB is 1,000,000,000,000 bytes2Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-monterey-blue-ssd.pdfRead 14 October 2026Monterey Blue datasheet lists 2TB, 1TB and 500GB3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026

Interface

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InterfaceiFastest host connection the drive is rated for. The PCIe generation of an NVMe drive is its own field. A Thunderbolt drive that also works over USB uses its Thunderbolt version.

USB41Maker product pagecorsair.com/us/en/p/data-storage/cssd-ex400us2tb/ex400u-survivor-2tb-usb4-external-ssd-cssd-ex400us2tbRead 15 October 2026Page says blazing-fast USB4 up to 40Gbps, USB4/Thunderbolt 4/iOS compatible and backwards compatible with USB 3.2 Type-C. Maximum performance needs a USB4 or higher connection. Stored as USB4, since Corsair does not call the drive a Thunderbolt device4Maker product pagecorsair.com/us/en/explorer/diy-builder/storage/corsair-ex400u-survivor-everything-you-need-to-knowRead 15 October 2026Table row Interface: USB4 Type-C, backward compatible with USB 3.2

USB 3.2 Gen 2x2 (20 Gbps)1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-ssd.pdfRead 14 October 2026Interface row reads USB 3.2 Gen 2x2 (20Gbps)

PCIe generationiHighest PCIe generation the drive supports, e.g. 5 for PCIe 5.0. NVMe drives only. A drive rated for PCIe 4.0 x4 or 5.0 x2 is 5 with 2 lanes, and the source note names both modes.

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PCIe lanesiLanes the drive uses at its highest PCIe generation, usually 4. NVMe drives only.

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NVMe versioniVersion of the NVMe specification as published. A revision letter is left out, so 2.0d is stored as 2.0.

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Detachable cableiExternal drives. No means the cable is fixed to the drive.

Yes1Maker product pagecorsair.com/us/en/p/data-storage/cssd-ex400us2tb/ex400u-survivor-2tb-usb4-external-ssd-cssd-ex400us2tbRead 15 October 2026One USB Type-C cable handles power and data and is listed in the package contents as a separate item

Yes3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026The cable is a separate item in the box, with a USB-C to USB-C cable for a drive with a USB-C port. The page does not use the word detachable

Hardware

3 of 7 differ

ControlleriController maker and model as named by the maker or a review. On an external drive, the controller of the SSD inside, not the USB or Thunderbolt bridge chip. The bridge chip goes in the source note.

Phison PS2251-214Maker product pagecorsair.com/us/en/explorer/diy-builder/storage/corsair-ex400u-survivor-everything-you-need-to-knowRead 15 October 2026Text says the Survivor uses the same controller and NAND as the EX400U. The EX400U's controller is the Phison PS2251-216Press articlegdm.or.jp/pressrelease/2025/1024/609408Read 15 October 2026Phison PS2251-218Reviewsmartworld.it/recensioni/corsair-ex400u-survivorRead 15 October 2026Spec table: Phison PS2251-219Reviewprofesionalreview.com/2025/11/29/corsair-ex400u-survivor-review/ampRead 15 October 2026Phison PS2251-2111Reviewguiahardware.es/corsair-ex400u-survivor-analisis-a-fondo-de-un-ssd-usb4-todoterrenoRead 15 October 2026Controller Phison PS2251-21. The review's weight of 149 g is the old launch figure

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Flash typeiBits stored in each flash cell. TLC stores three and QLC stores four. A maker can use another flash type in some capacities, so it is per variant.

TLC4Maker product pagecorsair.com/us/en/explorer/diy-builder/storage/corsair-ex400u-survivor-everything-you-need-to-knowRead 15 October 2026Text says the same controller and NAND as the EX400U. The SSD Review reads KIOXIA TLC memory for the EX400U10Reviewthessdreview.com/hardware/portable-ssds/corsair-ex400u-usb4-external-ssd-reviewRead 15 October 2026Review of the non-rugged EX400U, which Corsair says shares its controller and NAND with the SURVIVOR: Phison PS2251-21 USB4 controller with KIOXIA TLC memory. No review of the SURVIVOR opened the drive, so this is the sibling's reading, backed by Corsair's statement and GuiaHardware's reading of the SURVIVOR11Reviewguiahardware.es/corsair-ex400u-survivor-analisis-a-fondo-de-un-ssd-usb4-todoterrenoRead 15 October 2026Spec list for the 2TB SURVIVOR: NAND Flash TLC (Kioxia)

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Flash memoryiFlash maker and generation as named by the maker or a review.

Kioxia TLC9Reviewprofesionalreview.com/2025/11/29/corsair-ex400u-survivor-review/ampRead 15 October 2026Says the drive uses KIOXIA 3D NAND and that the maker does not say TLC or QLC10Reviewthessdreview.com/hardware/portable-ssds/corsair-ex400u-usb4-external-ssd-reviewRead 15 October 2026KIOXIA TLC memory. No layer count or generation is published11Reviewguiahardware.es/corsair-ex400u-survivor-analisis-a-fondo-de-un-ssd-usb4-todoterrenoRead 15 October 2026Kioxia TLC

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Flash layersiStacked layers of the 3D flash, from the maker or a review.

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DRAM cacheiDRAM is a memory chip on the drive. HMB is a drive without DRAM that borrows host memory. None has neither. HMB not stated is a drive without DRAM where no source says whether it borrows host memory. An external drive counts when a source names the cache of the drive inside.

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DRAM cache sizeiSize of the DRAM on the drive. Any DRAM type counts, such as DDR4 or LPDDR4X. Host memory buffer (HMB) is not DRAM on the drive.

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Component sidesiWhether chips sit on one or both sides of the board. Thin laptops and some handhelds need single-sided drives. M.2 drives only. The M.2 module code states it: S is single-sided and D is double-sided, e.g. 2280-S3-M or 2280-D5-M.

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Performance

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Sequential read (claimed)iMaker's up-to sequential read speed for this capacity. Test conditions are in the source note.

4,000MB/s1Maker product pagecorsair.com/us/en/p/data-storage/cssd-ex400us2tb/ex400u-survivor-2tb-usb4-external-ssd-cssd-ex400us2tbRead 15 October 2026Page says up to 4,000MB/sec read and 3,600MB/sec write, with the note that performance varies by capacity. No test tool, host or queue depth is given. The 1TB and 4TB pages show the same figures4Maker product pagecorsair.com/us/en/explorer/diy-builder/storage/corsair-ex400u-survivor-everything-you-need-to-knowRead 15 October 2026Peak sequential performance of up to 4,000MB/s reads and 3,600MB/s writes when connected to a USB4 host

2,000MB/s1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-ssd.pdfRead 14 October 2026Up to 2,000 MB/s read. Based on internal testing, host not named. Performance may be lower depending on host device, interface and usage. This datasheet gives no write speed2Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-monterey-blue-ssd.pdfRead 14 October 2026Up to 2,000 MB/s read for 500GB, 1TB and 2TB. The product page marks the 500GB read speed as projected3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026Specifications table: Up to 2000MB/s, and Projected up to 2000MB/s on the black 500GB SKU

Sequential write (claimed)iMaker's up-to sequential write speed for this capacity. Makers usually measure it inside the fast write cache.

3,600MB/s1Maker product pagecorsair.com/us/en/p/data-storage/cssd-ex400us2tb/ex400u-survivor-2tb-usb4-external-ssd-cssd-ex400us2tbRead 15 October 2026Up to 3,600MB/sec. Kakaku.com lists 3,500 MB/s write for the 1TB, which conflicts with the 1TB page and is not used4Maker product pagecorsair.com/us/en/explorer/diy-builder/storage/corsair-ex400u-survivor-everything-you-need-to-knowRead 15 October 2026Up to 3,600MB/s on a USB4 host

1,700MB/s2Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-monterey-blue-ssd.pdfRead 14 October 2026Footnote 2: 1TB and 2TB up to 1700 MB/s write. 500GB up to 1600 MB/s write. Based on internal testing, host not named. The 4TB write speed is on the product page. The product page shows 1700 MB/s for the black 500GB SKU, which disagrees with this datasheet. The datasheet is stored3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026Specifications table: Up to 1700MB/s for the 1TB, 2TB and 4TB SKUs. The black 500GB SKU shows 1700 MB/s and the blue 500GB SKU shows 1600 MB/s. The blue datasheet says 1600 for 500GB, which is stored

Random 4K read (claimed)iMaker's up-to random read speed with 4 KB blocks. Queue depth and threads are in the source note. The maker's headline claim. Makers test at different queue depths, so compare with care. The queue depth 1 measured fields compare better.

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Random 4K write (claimed)iMaker's up-to random write speed with 4 KB blocks. Queue depth and threads are in the source note. The maker's headline claim. Makers test at different queue depths, so compare with care. The queue depth 1 measured fields compare better.

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Endurance and reliability

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Endurance (TBW)iTerabytes that can be written within the warranty, as the maker rates them.

500TB6Press articlegdm.or.jp/pressrelease/2025/1024/609408Read 15 October 2026Write endurance 250 TBW (1TB), 500 TBW (2TB), 1,000 TBW (4TB). The base value is the 2TB. SmartWorld and Profesional Review give the same three figures

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MTBF or MTTF (claimed)iMean time between failures, or mean time to failure when the maker publishes MTTF. The source note says which. Some makers state it per capacity, so it is per variant.

1,400,000h6Press articlegdm.or.jp/pressrelease/2025/1024/609408Read 15 October 2026MTBF 1.4 million hours, the same for all capacities8Reviewsmartworld.it/recensioni/corsair-ex400u-survivorRead 15 October 2026Spec table: MTBF 1,400,000 hours12Spec databasekakaku.com/item/K0001723770/specRead 15 October 2026MTBF 140万時間 (1.4 million hours) for the 2TB. The 1TB and 4TB pages say the same. The 1TB page lists write 3500 MB/s, which conflicts with Corsair's 3,600 and is not used. Japanese release date on the site is 2025-12-18

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Operating temperatureiMaker's operating range. The storage range is not stored.

Min0Max70°C8Reviewsmartworld.it/recensioni/corsair-ex400u-survivorRead 15 October 2026Spec table: operating temperature 0 C to 70 C9Reviewprofesionalreview.com/2025/11/29/corsair-ex400u-survivor-review/ampRead 15 October 2026Operating 0 C to 70 C and storage -40 C to 85 C, from the maker's resistance specs. Storage range not stored

Min0Max45°C1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-ssd.pdfRead 14 October 2026Operating 0 to 45 C (32 to 113 F). The storage range of -20 to 85 C is not stored

Power

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Power while reading (claimed)iMaker's average power during sequential reads, including a figure given at the full read speed. A single average or active figure with no read and write split, such as Corsair's, is stored in both read and write, and the source note says so. A maximum figure, such as Kingston's (MAX) Read, is a peak and is not stored.

4.5W4Maker product pagecorsair.com/us/en/explorer/diy-builder/storage/corsair-ex400u-survivor-everything-you-need-to-knowRead 15 October 2026Comparison table: Power Active Read 4.5 W. SmartWorld lists 4.5 W too8Reviewsmartworld.it/recensioni/corsair-ex400u-survivorRead 15 October 2026Spec table: power use 4.5 W, which matches Corsair's active read figure

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Power while writing (claimed)iMaker's average power during sequential writes. A single average or active figure with no read and write split is stored in both read and write, and the source note says so. A maximum figure, such as Kingston's (MAX) Write, is a peak and is not stored.

4.1W4Maker product pagecorsair.com/us/en/explorer/diy-builder/storage/corsair-ex400u-survivor-everything-you-need-to-knowRead 15 October 2026Comparison table: Power Active Write 4.1 W

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Max power consumption (claimed)iMaker's peak or maximum power figure. Not the average while reading or writing. Kingston publishes max read and max write power apart. Store the higher one and name both in the source note.

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Average power in light use (claimed)iMaker's average over a mixed client workload such as MobileMark. Not idle power and not read or write power.

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Idle power (claimed)iMaker's idle power in the PS3 state with APST on, or the state the maker calls low-power idle. On a SATA drive, Slumber counts as low-power idle. A plain idle figure with no low-power state, often near 1 W, is active idle and is not stored. Samsung's Idle with DIPM on is a SATA link power state, so it counts as low-power idle.

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Sleep power (claimed)iMaker's power in the deepest sleep state, PS4 or L1.2. On a SATA drive this is DevSleep.

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Measured

None of 9 known

Sequential read (measured)iCrystalDiskMark SEQ1M Q8T1 read result from a reviewer. Host and slot are in the source note. KitGuru's default profile counts as SEQ1M Q8T1.

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Sequential write (measured)iCrystalDiskMark SEQ1M Q8T1 write result from a reviewer. Host and slot are in the source note.

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Random 4K read at queue depth 1 (measured)iCrystalDiskMark RND4K Q1T1 read result from a reviewer. Small reads one at a time, close to everyday use. KitGuru's 4K QD1 1 Thread test counts as RND4K Q1T1. A CrystalDiskMark result printed in IOPS is stored as IOPS x 4096 / 1,000,000 MB/s, the way CrystalDiskMark converts.

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Random 4K write at queue depth 1 (measured)iCrystalDiskMark RND4K Q1T1 write result from a reviewer. A CrystalDiskMark result printed in IOPS is stored as IOPS x 4096 / 1,000,000 MB/s, the way CrystalDiskMark converts.

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Write cache size (measured)iData written at full speed in one long sequential write on an empty drive before the speed drops.

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Write speed after the cache (measured)iWrite speed in the first state after the fast cache is full, when the drive writes straight to TLC or QLC. Tom's Hardware calls it TLC mode. The slower folding state and the lowest dip are not stored. Only from a long sequential write test.

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3DMark Storage BenchmarkiOverall score measured by a reviewer. Host and slot are in the source note. From StorageReview only. Tom's Hardware scores the same drive about 30 percent higher, so other reviewers are not mixed in.

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Highest temperature under load (measured)iHighest drive sensor reading in a sustained write test of 10 minutes or more, on the bare drive unless the row is a heatsink version. Short benchmark runs do not count. Heatsink, airflow and room temperature go in the source note.

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Idle power (measured)iReviewer's idle reading. Power-saving settings such as ASPM are in the source note. A value read from a chart image counts when the source note says "read from chart".

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Cooling and build

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HeatsinkiVersions sold. The base lists every version and each variant row lists its own. A water block or a cooler with a fan counts as a heatsink. A thermal pad or label alone is bare. A heatsink in the box that the buyer fits, as on the XPG MARS 980 BLADE, counts as with heatsink.

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RGB lightingiAny version sold has lighting the user can set. A status LED alone does not count. Leave it out when no version has lighting. The Heatsink rows show which version has it.

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Dust and water ratingiPublished IP rating of an external drive.

IP551Maker product pagecorsair.com/us/en/p/data-storage/cssd-ex400us2tb/ex400u-survivor-2tb-usb4-external-ssd-cssd-ex400us2tbRead 15 October 2026Page says a rugged, environmentally sealed enclosure (IP55)4Maker product pagecorsair.com/us/en/explorer/diy-builder/storage/corsair-ex400u-survivor-everything-you-need-to-knowRead 15 October 2026Comparison table IP Rating: IP55. Text: partial dust protection and protection against water jets from any direction, not submersion5Press releasecorsair.com/newsroom/press-release/corsair-adds-rugged-performance-and-mobile-convenience-to-its-storage-portfolioRead 15 October 2026Durable, impact-resistant IP55-rated housing

IP651Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-ssd.pdfRead 14 October 2026Durability row reads IP65 with drop protection up to three meters. Footnote: IEC 60529 IP65, tested to withstand water flow (30 kPa) for 3 minutes. Limited dust contact does not interfere with operation. Must be clean and dry before use3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026IP65 rating

Drop test heightiMaker-published tested height. Surface and conditions are in the source note.

Not available

3m1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-ssd.pdfRead 14 October 2026Up to 3 m, based on internal testing. Surface and conditions are not stated3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026Up to 3-meter drop protection

Security and software

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SecurityiFeatures the maker names for the drive. Encryption done by host software does not count. ATA Security passthrough counts as password protection.

Not available

AES 256-bit hardware encryption, Password protection1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-ssd.pdfRead 14 October 2026Highlights read 256-bit AES encryption with password protection. Footnote 4 says password protection uses 256-bit AES and needs a software download. The press release calls it 256-bit AES hardware encryption3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026Features read 256-BIT AES encryption with password protection4Press releasesandisk.com/company/newsroom/press-releases/2026/2026-02-24-sandisk-introduces-next-generation-portable-ssd-portfolio-to-support-faster-more-demanding-workflows-and-ai-developed-contentRead 14 October 2026Reads password protection included with 256-bit AES hardware encryption

Software

Corsair SSD Toolbox1Maker product pagecorsair.com/us/en/p/data-storage/cssd-ex400us2tb/ex400u-survivor-2tb-usb4-external-ssd-cssd-ex400us2tbRead 15 October 2026Downloads list CORSAIR SSD Toolbox 2.0 Preview and the EX400U/EX400U SURVIVOR firmware update utility5Press releasecorsair.com/newsroom/press-release/corsair-adds-rugged-performance-and-mobile-convenience-to-its-storage-portfolioRead 15 October 2026Says the drive includes CORSAIR SSD Toolbox software for secure erase and firmware updates

SANDISK app1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-ssd.pdfRead 14 October 2026SANDISK app footnote: download and installation required, Android 8+, macOS 11+ and Windows 10 and 11. The footnote points to sandisk.com/memoryzone for app details3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026The SANDISK app for mobile and desktop manages, backs up and transfers files

Compatibility

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PlatformsiPlatforms the maker names for this drive. A PS5 needs a heatsink on an internal drive. PC is for a maker that writes Client PCs or PC without naming an operating system. Handheld PCs go in Other with a source note.

Windows, macOS, iOS, iPadOS1Maker product pagecorsair.com/us/en/p/data-storage/cssd-ex400us2tb/ex400u-survivor-2tb-usb4-external-ssd-cssd-ex400us2tbRead 15 October 2026Page names USB4/Thunderbolt 4 laptop and desktop hosts and iOS/iPadOS 13 and later with USB Type-C. The blog names Windows, macOS, iOS and iPadOS4Maker product pagecorsair.com/us/en/explorer/diy-builder/storage/corsair-ex400u-survivor-everything-you-need-to-knowRead 15 October 2026Text: a wide range of devices and operating systems, including Windows, macOS, iOS, and iPadOS. Works with Thunderbolt 4 and Thunderbolt 5

Windows, macOS, Android, iOS, iPadOS1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-ssd.pdfRead 14 October 2026System compatibility reads macOS 13+ (Time Machine compatible) and Windows 10+. The app compatibility row adds Android 8+. The product page adds iPadOS 15+ and the iOS Files app3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026Compatibility reads Android 10+, iPadOS 15+, macOS 12+, Windows 10+ and Files App for iOS 17+

Dimensions and weight

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DimensionsiLength is the long side. Height is the thickness, including a fitted heatsink. As the maker publishes it. A maximum counts. Length is the long side even when the maker lists the width first.

Length82.1Width40Height17.1mm(3.2 × 1.6 × 0.7 in)4Maker product pagecorsair.com/us/en/explorer/diy-builder/storage/corsair-ex400u-survivor-everything-you-need-to-knowRead 15 October 2026Comparison table: 82.1 x 40 x 17.1 mm, written L x W x H. The launch spec in the Japanese press release agrees (width 40, depth 82.1, height 17.1)6Press articlegdm.or.jp/pressrelease/2025/1024/609408Read 15 October 2026Width 40 mm, depth 82.1 mm, height 17.1 mm. The same listing gives 149 g, which Corsair later replaced with 80 g9Reviewprofesionalreview.com/2025/11/29/corsair-ex400u-survivor-review/ampRead 15 October 2026About 8.2 x 4 x 1.7 cm and about 80 g

Length85Width51Height9.8mm(3.3 × 2 × 0.4 in)1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-ssd.pdfRead 14 October 2026Product dimensions row reads 3.35 x 2 x 0.39 in | 85 x 51 x 9.8 mm3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 20263.35 x 2 x 0.39 in on the page. The metric values come from the datasheet

WeightiDrive alone, with a heatsink when it is sold fitted. No cable and no packaging. As the maker publishes it. A maximum counts. Not a measured weight.

80g(2.8 oz)4Maker product pagecorsair.com/us/en/explorer/diy-builder/storage/corsair-ex400u-survivor-everything-you-need-to-knowRead 15 October 2026Comparison table: 80 g (2.8 oz). The blog is dated as updated 2025-12-03. The launch spec reprinted by GDM gave 149 g, and Phototrend and GuiaHardware repeat 149 g. SmartWorld gives 83 g and a Phototrend reader measured 82.44 g for a 1TB drive. The later maker figure of 80 g is stored

46.9g(1.7 oz)1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-ssd.pdfRead 14 October 2026Product weight row reads 0.10 lb | 46.9 g3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 202646.9 g

In the box

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In the box

EX400U Survivor External SSD, USB-C to USB-C cable (30cm, 40Gb)1Maker product pagecorsair.com/us/en/p/data-storage/cssd-ex400us2tb/ex400u-survivor-2tb-usb4-external-ssd-cssd-ex400us2tbRead 15 October 2026Package Contents row reads EX400U Survivor External SSD, USB-C to USB-C cable (30cm, 40Gb). Stored as two items

SANDISK Extreme Portable SSD, USB-C to USB-C Cable, Quick Install and Warranty Guide3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026In The Box reads SANDISK Extreme Portable SSD, USB-C to USB-C Cable, Quick Install and Warranty Guide. It is the same for every SKU

Cables includediCables supplied with an external drive.

ACORSAIR EX400U SURVIVOR

Type	Length (m)	Count
USB-C to USB-C	0.3	1

Source1Maker product pagecorsair.com/us/en/p/data-storage/cssd-ex400us2tb/ex400u-survivor-2tb-usb4-external-ssd-cssd-ex400us2tbRead 15 October 2026Package contents list a USB-C to USB-C cable of 30cm that carries 40Gb

BSandisk Extreme Portable SSD (V3)

Type	Count
USB-C to USB-C	1

Source3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026One USB-C to USB-C cable. The page gives no cable length

Links

Not compared

Product page

www.corsair.com/us/en/p/data-storage/cssd-ex400us2tb/ex400u-survivor-2tb-usb4-external-ssd-cssd-ex400us2tb1Maker product pagecorsair.com/us/en/p/data-storage/cssd-ex400us2tb/ex400u-survivor-2tb-usb4-external-ssd-cssd-ex400us2tbRead 15 October 2026

www.sandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v33Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 2026

Spec sheet

Not available

documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-ssd.pdf1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-ssd.pdfRead 14 October 2026

Manual

Not available

Not available

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

Not available

Warranty

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Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

5years1Maker product pagecorsair.com/us/en/p/data-storage/cssd-ex400us2tb/ex400u-survivor-2tb-usb4-external-ssd-cssd-ex400us2tbRead 15 October 2026Page says a five-year warranty4Maker product pagecorsair.com/us/en/explorer/diy-builder/storage/corsair-ex400u-survivor-everything-you-need-to-knowRead 15 October 2026Comparison table: 5 years, against 3 years for the EX400U5Press releasecorsair.com/newsroom/press-release/corsair-adds-rugged-performance-and-mobile-convenience-to-its-storage-portfolioRead 15 October 2026Five-year limited warranty

5years1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-portable-ssd/data-sheet-extreme-portable-ssd.pdfRead 14 October 20265-year limited warranty. The datasheet is global and names no market3Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-portable-ssd-v3Read 14 October 20265-Year Limited Warranty

Both are also in the API. Back to all SSDs.