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CORSAIR EX400U SURVIVOR vs Sandisk Extreme PRO Portable SSD with USB4

A

Product A: CORSAIR

EX400U SURVIVOR

28 of 63 known

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B

Product B: Sandisk

Extreme PRO Portable SSD with USB4

30 of 63 known

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All 63 fields

Every value links to where we found it.

Only differences

ACORSAIR EX400U SURVIVOR

BSandisk Extreme PRO Portable SSD with USB4

General

4 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

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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

SDSSDE82-2T00-G25, SDSSDE82-4T00-G252Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-pro-usb-4-portable-ssdRead 14 October 2026SanDisk's own links for the page carry sku=SDSSDE82-2T00-G25 and sku=SDSSDE82-4T00-G25. TechRadar's spec table also reads SDSSDE82-2T00-G25

GTIN / EAN

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619659194376, 6196591944069Spec databasecamelcamelcamel.com/product/B0DN6DK3X4Read 14 October 2026Search summary of the 4TB SDSSDE82-4T00-G25 listing gives UPC 619659194406 and retailers list EAN 0619659194406. Search summary of Farnell Ireland's listing for the 2TB SDSSDE82-2T00-G25 gives 0619659194376, which is UPC 619659194376. Both pages block direct fetches. Both codes have valid check digits

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

November 20248Press articlechargerlab.com/sandisk-unveils-extreme-pro-usb4-portable-ssd-high-speed-durable-storage-up-to-4tbRead 14 October 2026ChargerLAB article dated 22 November 2024 says SanDisk introduced its first USB4 portable SSD. It gives no ship date or price. Forbes places the announcement in November 2024 alongside other Western Digital flash products, but its page could not be fetched

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

Available2Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-pro-usb-4-portable-ssdRead 14 October 2026The page is live for the 2TB and 4TB with a sku selector

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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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

$279.993Reviewtomshardware.com/pc-components/external-ssds/sandisk-extreme-pro-with-usb4-2-tb-reviewRead 14 October 2026Spec table price $279 (2TB) and $429 (4TB), which are Amazon prices at review time and not stated as MSRP6Reviewthessdreview.com/hardware/portable-ssds/sandisk-extreme-pro-usb-4-portable-ssd-reviewRead 14 October 2026Review of 3 May 2025 states MSRP $279.99 US for the 2TB and 429.99 US for the 4TB. No maker page states a price7Reviewtechradar.com/pro/sandisk-extreme-pro-with-usb4-reviewRead 14 October 2026Asking price $279.99 (2TB) and $429.99 (4TB) in the US at review time

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.

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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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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-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Form Factor row reads 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

2 TB, 4 TB1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Available Capacities row reads 2TB and 4TB. Footnote 2 says 1TB equals 1,000,000,000,000 bytes

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

USB41Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Interface row reads USB4 Gen 3x2 (40Gb/s). The highlights say the drive supports Thunderbolt 4 hosts and works with older USB 3.2 and USB 2.0 devices

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

Yes3Reviewtomshardware.com/pc-components/external-ssds/sandisk-extreme-pro-with-usb4-2-tb-reviewRead 14 October 2026The cable is a separate item in the box and the drive has a USB-C port7Reviewtechradar.com/pro/sandisk-extreme-pro-with-usb4-reviewRead 14 October 2026The cable is separate from the drive. No USB-A adapter is included

Hardware

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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

2 of 4 differ

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

3,800MB/s1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Data Transfer Rates row reads up to 3800MB/s read. Footnote 1: based on internal testing, performance may be lower depending on host device, interface, usage conditions and other factors. 1MB is 1,000,000 bytes. The same figure is given for 2TB and 4TB

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

3,700MB/s1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Up to 3700MB/s write, same footnote and same figure for 2TB and 4TB

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

Min5Max45°C1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Operating Temperature 5 C to 45 C. The storage range of -20 C 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

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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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3,717MB/s4Reviewssd-tester.com/sandisk_extreme_pro_mit_usb4_2tb.htmlRead 14 October 20262TB (SDSSDE82-2T00-G25), tested on 9 February 2026. CrystalDiskMark 7.0 SEQ1M Q8T1 read 3,717.23 MB/s. KitGuru has not reviewed this drive, so another reviewer is used. The test file size and the drive fill are not stated. The site says its tests since 2023 use an AMD Ryzen 9 7900 PC that can test USB4 drives, and it does not name the port. Tom's Hardware printed 3,716.62 MB/s read and 3,710.54 MB/s write in CrystalDiskMark 8 default settings on a Ryzen 7600X system, and TechRadar printed 3,810 and 3,662 MB/s, which agree within 3 percent

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

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3,704MB/s4Reviewssd-tester.com/sandisk_extreme_pro_mit_usb4_2tb.htmlRead 14 October 20262TB. CrystalDiskMark SEQ1M Q8T1 write 3,703.80 MB/s, same conditions

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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56.39MB/s4Reviewssd-tester.com/sandisk_extreme_pro_mit_usb4_2tb.htmlRead 14 October 20262TB. CrystalDiskMark RND4K Q1T1 read 56.39 MB/s, printed as 13,766.4 IOPS in the same table. 13,766.4 x 4096 / 1,000,000 gives 56.39

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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19.4MB/s4Reviewssd-tester.com/sandisk_extreme_pro_mit_usb4_2tb.htmlRead 14 October 20262TB. CrystalDiskMark RND4K Q1T1 write 19.40 MB/s, printed as 4,736.3 IOPS. 4,736.3 x 4096 / 1,000,000 gives 19.40. ServeTheHome says the drive sustains 19 MB/second in 4K random writes

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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1,100MB/s3Reviewtomshardware.com/pc-components/external-ssds/sandisk-extreme-pro-with-usb4-2-tb-reviewRead 14 October 20262TB. Iometer sequential write, 1MiB blocks, queue depth 32, 15 minutes. Text says the drive writes just below 3,500 MB/s for almost three minutes, then drops to around 1,100 MB/s for about five minutes, then to around 800 MB/s for the rest. The chart shows the plateau at about 1,150 MB/s. The first drop is stored. The 800 MB/s state is not. Cache size in GB is not printed, so it is not stored. PC Gamer saw a different pattern in its own test

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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1,370points5Reviewstoragereview.com/review/sandisk-extreme-pro-with-usb4-review-fast-rugged-hugeRead 14 October 20262TB (1862GB exFAT partition). 3DMark Storage Benchmark overall score 1,370, average 229.23 MB/s at 128 microseconds. Test host: AMD Ryzen 7 9800X3D, Asus ROG Crosshair X870E Hero, DDR5-6000, RTX 4090, Windows 11 Pro. The USB port used is not stated

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

IP653Reviewtomshardware.com/pc-components/external-ssds/sandisk-extreme-pro-with-usb4-2-tb-reviewRead 14 October 2026Text says SanDisk states an IP65 rating for water resistance7Reviewtechradar.com/pro/sandisk-extreme-pro-with-usb4-reviewRead 14 October 2026Says SanDisk tested the drive to IEC 60529 IP65, where it withstood water flow (30 kPa) for 3 minutes

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

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2m3Reviewtomshardware.com/pc-components/external-ssds/sandisk-extreme-pro-with-usb4-2-tb-reviewRead 14 October 2026Text says SanDisk says the drive should survive drops up to two meters. The surface is not stated7Reviewtechradar.com/pro/sandisk-extreme-pro-with-usb4-reviewRead 14 October 2026Says the drive can survive a fall of 2 meters, and the claim does not detail what it fell onto

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 protection6Reviewthessdreview.com/hardware/portable-ssds/sandisk-extreme-pro-usb-4-portable-ssd-reviewRead 14 October 2026States the drive supports hardware encryption. The review gives no key length7Reviewtechradar.com/pro/sandisk-extreme-pro-with-usb4-reviewRead 14 October 2026Spec table Encryption row reads Hardware. Text says the drive supports hardware encryption8Press articlechargerlab.com/sandisk-unveils-extreme-pro-usb4-portable-ssd-high-speed-durable-storage-up-to-4tbRead 14 October 2026Reads 256-bit AES hardware encryption with password protection. No maker document for this model confirms it, and TechRadar and TheSSDReview confirm 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 Memory Zone8Press articlechargerlab.com/sandisk-unveils-extreme-pro-usb4-portable-ssd-high-speed-durable-storage-up-to-4tbRead 14 October 2026Reads the drive works with the SanDisk Memory Zone app on Android. The page also says drop protection up to 3 meters, which conflicts with the 2 m in SanDisk's product title and is not used

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, PS5, Xbox Series X|S1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026System Requirements row reads Windows 10+ | macOS 14+ | Xbox Series X|S | PS5. The Compatibility row names USB Type-C devices such as laptops and tablets without naming an operating system

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

Length140Width68.7Height11.9mm(5.5 × 2.7 × 0.5 in)1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Product Dimensions row reads 5.51 x 2.70 x 0.47 in | 140.00 x 68.70 x 11.90 mm. Tom's Hardware prints 140 x 68.58 x 11.94 mm, which is the same size in inches

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

172g(6.1 oz)1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Product Weight row reads 0.38 lb | 172 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

USB Type-C cable3Reviewtomshardware.com/pc-components/external-ssds/sandisk-extreme-pro-with-usb4-2-tb-reviewRead 14 October 2026Spec table row Included: USB Type-C cable. Text says the box holds the drive, a roughly 11-inch USB-C-to-USB-C cable and paperwork

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 PRO Portable SSD with USB4

Type	Length (m)	Count
USB-C to USB-C	0.28	1

Source3Reviewtomshardware.com/pc-components/external-ssds/sandisk-extreme-pro-with-usb4-2-tb-reviewRead 14 October 2026Roughly 11-inch USB-C-to-USB-C cable, which is about 28 cm. TechRadar says the cable is 28cm long and TheSSDReview says 12 inches6Reviewthessdreview.com/hardware/portable-ssds/sandisk-extreme-pro-usb-4-portable-ssd-reviewRead 14 October 202612-inch USB4 Type-C to Type-C cable that also powers the drive7Reviewtechradar.com/pro/sandisk-extreme-pro-with-usb4-reviewRead 14 October 2026The 28cm long USB-C cable is the only accessory

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-pro-usb-4-portable-ssd2Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-pro-usb-4-portable-ssdRead 14 October 2026The SanDisk product page loads its content with scripts, so only its title (2TB SanDisk Extreme PRO with USB4) could be read. The data sheet and reviews carry the specs

Spec sheet

Not available

documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdf1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Two-page SanDisk data sheet for the Extreme PRO with USB4, copyright 2024, hosted on documents.sandisk.com

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-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 20265 year limited warranty. The data sheet names no market and points to sandisk.com/wug for terms

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