SSDs / Compare

CORSAIR EX400U SURVIVOR vs LaCie Rugged SSD4

A

Product A: CORSAIR

EX400U SURVIVOR

28 of 63 known

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B

Product B: LaCie

Rugged SSD4

26 of 63 known

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All 63 fields

Every value links to where we found it.

Only differences

ACORSAIR EX400U SURVIVOR

BLaCie Rugged SSD4

General

5 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

Rugged2Maker product pageseagate.com/products/creative-pro/lacie-rugged-ssd4Read 14 October 2026Page text calls the drive one of the high-performance Rugged portable SSDs. The what's-included list names it LaCie Rugged SSD4

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

STND1000400, STND2000400, STND40004001Maker spec sheet (PDF)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026Ordering table: STND1000400 (1TB), STND2000400 (2TB), STND4000400 (4TB), region WW

GTIN / EAN

Not available

763649185964, 8719706046206, 763649185988, 8719706046220, 763649186008, 87197060462441Maker spec sheet (PDF)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026Ordering table: UPC and EAN per model. 1TB 763649185964 and 8719706046206. 2TB 763649185988 and 8719706046220. 4TB 763649186008 and 8719706046244. Multi-pack UPCs are not stored

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

15 September 20254Press articlestoragenewsletter.com/2025/09/17/seagate-launches-lacie-rugged-ssd4-thunderbolt-5-up-to-4tb-portable-ssdRead 14 October 2026StorageNewsletter, 2025-09-17, repeats the Seagate announcement. PCWorld's review is dated 2025-09-15, the same day as the Seagate release

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 pageseagate.com/products/creative-pro/lacie-rugged-ssd4Read 14 October 2026The Wayback Machine holds captures of the product page up to July 2026. Retailers such as Wex list the 2TB. Stock is mixed4Press articlestoragenewsletter.com/2025/09/17/seagate-launches-lacie-rugged-ssd4-thunderbolt-5-up-to-4tb-portable-ssdRead 14 October 2026Sold at launch through the Seagate webstore

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

$249.994Press articlestoragenewsletter.com/2025/09/17/seagate-launches-lacie-rugged-ssd4-thunderbolt-5-up-to-4tb-portable-ssdRead 14 October 2026Available for $134.99 (1TB), $249.99 (2TB) and $479.99 (4TB). StorageReview, TechRadar and Macworld give the same prices. Excl. sales tax10Measurementstoragereview.com/review/lacie-rugged-ssd4-review-usb4-performance-in-a-tough-travel-ready-shellRead 14 October 2026Review lists the MSRP as $134.99, $249.99 and $479.9911Reviewmacworld.com/article/2939911/lacie-rugged-ssd4-review-2.htmlRead 14 October 2026Review dated 2025-10-14 lists 1TB $135, 2TB $250 and 4TB $480, rounded from the launch prices

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

€299.995Press articlephototrend.fr/2025/09/lacie-rugged-ssd4-usb4Read 14 October 2026French launch coverage, available now: 1 To 169,99 EUR, 2 To 299,99 EUR, 4 To 529,99 EUR. France, incl. VAT. A German Seagate price was not 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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Orange4Press articlestoragenewsletter.com/2025/09/17/seagate-launches-lacie-rugged-ssd4-thunderbolt-5-up-to-4tb-portable-ssdRead 14 October 2026Text names the signature orange bumper, designed by Neil Poulton

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)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026Portable drive in its own case with a USB-C port8Reviewkitguru.net/components/ssd-drives/simon-crisp/lacie-rugged-ssd4-4tb-review/all/1Read 14 October 2026Form Factor: external

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

1 TB, 2 TB, 4 TB1Maker spec sheet (PDF)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026Ordering table lists 1TB, 2TB and 4TB. The data sheet footnote says 1 TB equals one trillion 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)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026System Requirements: Interface USB 40 Gbps, connector USB-C. Works with USB-C hosts at USB 40, 20, 10 and 5 Gbps and Thunderbolt 5, 4 and 3. The drive is a USB 40 Gbps drive that Thunderbolt hosts can run, so it is stored as USB48Reviewkitguru.net/components/ssd-drives/simon-crisp/lacie-rugged-ssd4-4tb-review/all/1Read 14 October 2026Interface: USB 40Gbps (USB-C). An NVMe PCIe Gen 4 SSD sits inside. The reviewer lists NAND and controller as not specified

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

Yes1Maker spec sheet (PDF)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026A USB-C cable is included and the drive has a USB-C port behind a removable silicone cap

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

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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

4,000MB/s1Maker spec sheet (PDF)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026Text reads read speeds up to 4,000 MB/s. The data sheet gives no write figure. The test host is not named2Maker product pageseagate.com/products/creative-pro/lacie-rugged-ssd4Read 14 October 2026Page reads speeds up to 4,000MB/s with USB 40Gbps and Thunderbolt 5 compatibility

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

3,800MB/s4Press articlestoragenewsletter.com/2025/09/17/seagate-launches-lacie-rugged-ssd4-thunderbolt-5-up-to-4tb-portable-ssdRead 14 October 2026Text reads up to 4,000MB/s read and 3,800MB/s write speeds, from the Seagate announcement. PCPer adds that LaCie said writes reach 3,800 MB/s for the first 4 percent of the drive and then fall to 850 to 1,750 MB/s. Seagate gives no per-capacity figures, so the base value covers all rows

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

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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

IP541Maker spec sheet (PDF)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026Footnote 2: rated IP54 when the cap is properly seated on the device2Maker product pageseagate.com/products/creative-pro/lacie-rugged-ssd4Read 14 October 2026Page reads IP54-rated, footnote: rated IP54 when the cap is properly seated on the device

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

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3m1Maker spec sheet (PDF)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026Footnote 3: 3m drop-proof based on internal testing, shock resistance MIL-STD-810G method 516.6, Procedure IV Transit Drop. The text also says 1 tonne pressure resistance, which is not stored2Maker product pageseagate.com/products/creative-pro/lacie-rugged-ssd4Read 14 October 2026Page reads 3m drop resistance and 1-ton pressure resistance, with the MIL-STD-810G method 516.6 Procedure IV footnote

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.

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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

LaCie Toolkit1Maker spec sheet (PDF)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026What's Included: LaCie Toolkit Backup and Sync Software2Maker product pageseagate.com/products/creative-pro/lacie-rugged-ssd4Read 14 October 2026Page reads LaCie Toolkit software for on-demand backups3Owner's manualseagate.com/manuals/lacie/rugged-ssd4/welcomeRead 14 October 2026Getting Started page: Toolkit manages mirror folders and backup plans (Windows only)

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

macOS, iPadOS, iOS, Windows, ChromeOS, Android, Other1Maker spec sheet (PDF)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026Text and System Requirements: macOS, iPadOS, iOS, Windows, ChromeOS, Android and gaming console systems. Consoles are not named, so they are stored as other2Maker product pageseagate.com/products/creative-pro/lacie-rugged-ssd4Read 14 October 2026Page reads USB-C connectivity with macOS, iPadOS, iOS, Windows, ChromeOS, Android and gaming console systems

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

Length105.34Width66.87Height17.33mm(4.1 × 2.6 × 0.7 in)1Maker spec sheet (PDF)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026Product Dimensions column: length 17.33 mm, width 66.87 mm, depth 105.34 mm. The long side 105.34 is stored as length and 17.33 as height8Reviewkitguru.net/components/ssd-drives/simon-crisp/lacie-rugged-ssd4-4tb-review/all/1Read 14 October 2026Physical Specifications: 17.33 x 66.87 x 105.34mm, same as the data sheet

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

108g(3.8 oz)1Maker spec sheet (PDF)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026Product Dimensions column: 0.108 kg, 0.238 lb8Reviewkitguru.net/components/ssd-drives/simon-crisp/lacie-rugged-ssd4-4tb-review/all/1Read 14 October 2026Drive Weight: 108g

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

LaCie Rugged SSD4, Silicone cap, USB-C cable (40 Gbps), Quick Install Guide, LaCie Toolkit Backup and Sync Software, Includes two-month trial to Adobe Creative Cloud Pro, Three-year Rescue Data Recovery Services1Maker spec sheet (PDF)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026What's Included list, verbatim3Owner's manualseagate.com/manuals/lacie/rugged-ssd4/welcomeRead 14 October 2026The manual's box content is shorter than the data sheet list. The data sheet list is stored

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

BLaCie Rugged SSD4

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

Source1Maker spec sheet (PDF)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026What's Included reads USB-C cable (40 Gbps). The cable length is from PCPer. Footnote 1 mentions a C to A cable adapter, sold separately3Owner's manualseagate.com/manuals/lacie/rugged-ssd4/welcomeRead 14 October 2026Welcome page, Box content: LaCie Rugged SSD4, USB-C to USB-C cable, Quick install guide. The cable length is not in the manual6Reviewpcper.com/2025/09/lacie-rugged-ssd4-portable-ssd-review-a-sensible-usb4-optionRead 14 October 2026Review text: a matching orange USB4 cable, 0.3 meters in length. The SSD Review calls it a 12 inch orange 40Gbps cable7Reviewthessdreview.com/hardware/portable-ssds/lacie-rugged-ssd4-2tb-usb4-portable-ssd-review-high-speed-data-transfer-in-any-terrainRead 14 October 2026Review text: comes with a 12 inch orange 40Gbps cable, which is 0.3048 m

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.seagate.com/products/creative-pro/lacie-rugged-ssd42Maker product pageseagate.com/products/creative-pro/lacie-rugged-ssd4Read 14 October 2026The live page returned a Cloudflare rate-limit error (1015) on 2026-10-14. It was read through the Wayback Machine capture of 2026-03-25

Spec sheet

Not available

www.seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdf1Maker spec sheet (PDF)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026Seagate data sheet DS25.3-2510US, English (UK) file. The en_US file name returned 404

Manual

Not available

www.seagate.com/manuals/lacie/rugged-ssd43Owner's manualseagate.com/manuals/lacie/rugged-ssd4/welcomeRead 14 October 2026LaCie Rugged SSD4 User Manual on the Seagate site. The live site returned a rate-limit error on 2026-10-14, so the pages were read through the Wayback Machine copies of October 2025

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

3years1Maker spec sheet (PDF)seagate.com/content/dam/seagate/en_gb/content-fragments/products/datasheets/lacie-rugged-ssd4/lacie-rugged-ssd4-DS25-3-2510US-en_GB.pdfRead 14 October 2026Ordering table: limited warranty 3 years, with Rescue Data Recovery Services (not available in all countries)

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