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Head-to-head · Best External SSDs

Corsair EX400U (1 TB) vs Samsung T7 Shield

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

Samsung T7 Shield comes out ahead by a narrow margin (4.4 vs 4.3). Samsung T7 Shield is best for: Travelers and outdoor users who value water, dust and drop protection plus hardware encryption over top transfer speed. Read the strengths below before deciding.

Corsair EX400U (1 TB)
Ranked #3 in Best External SSDs
Corsair EX400U (1 TB)
3 sources$305.72as of Oct 16

The SSD Review clocked the Corsair EX400U at up to 4GB/s read on Thunderbolt 5 systems while warning that motherboard implementations often limit USB4 speeds. PCMag's Tony Hoffman singled out the unusual magnetic Magsafe connector, which lets the drive attach securely to metal surfaces such as the Corsair 6500x case. Phison controllers and KIOXIA memory earned praise for build quality, though reviewers repeated the caveat: without USB4 support on the host device, expect significant speed bottlenecks. Buy it for a high-end USB4/Thunderbolt setup where secure physical attachment matters, not for a machine with standard USB 3.2 ports.

Strengths
  • — Achieves up to 4GB/s read and 3.6GB/s write speeds on compatible USB4/Thunderbolt 4 systems
  • — Features a unique magnetic Magsafe connector for secure attachment to metal surfaces
  • — Constructed with high-quality internal components including Phison PS2251-21 controller and KIOXIA TLC memory
Watch-outs
  • — Not waterproof despite being shock resistant
$305.72 · Check Price on AmazonFull review →
Samsung T7 Shield
Higher ratedRanked #2 in Best External SSDs
Samsung T7 Shield
4 sources

Reviewers rate the Samsung T7 Shield mainly on toughness: IP65 water and dust resistance plus 3-meter drop protection make it a reliable travel and outdoor drive. They also point to AES 256-bit hardware encryption and a 4TB capacity that is rare in Samsung's portable lineup. The soft silicone exterior attracts dust, and the top transfer speed of 1050MB/s only arrives if the host supports 10Gbps USB. Pick it when durability and security matter more than sleek looks or peak speed on older hardware.

Strengths
  • — IP65-certified water and dust resistance
  • — 3-meter drop resistance for durability
  • — AES 256-bit hardware encryption for data security
Watch-outs
  • — Silicone exterior casing attracts dust and lint
  • — Requires 10Gbps USB port for maximum 1050MB/s speeds
Check Price on AmazonFull review →

How they stack up

Corsair EX400U (1 TB)

The Corsair EX400U (1 TB) uses a USB4 (40Gbps) interface, double the 20Gbps USB 3.2 Gen 2x2 link of the Crucial X10 Pro, and it costs more than the Crucial. It is not waterproof, where the Samsung T7 Shield carries an IP65 rating and the OWC Envoy Ultra IP67. Its listed 3.5 GB/s maximum read speed is below the 6000 MB/s listed for the Thunderbolt 5 OWC Envoy Ultra.

Samsung T7 Shield

The Samsung T7 Shield tops out at 1050MB/s over USB 3.2 Gen 2, about half the up-to-2,100MB/s listed for the Crucial X10 Pro and well below the 6000 MB/s of the OWC Envoy Ultra. It is built for rough handling, with an IP65 rating and 3-meter drop resistance, where the Corsair EX400U (1 TB) is not waterproof. Like the Crucial X10 Pro, it has AES 256-bit hardware encryption.

Specs side-by-side

SpecCorsair EX400U (1 TB)Samsung T7 Shield
InterfaceUSB4 (40Gbps)USB 3.2 Gen 2
Capacity1 TB4TB
Max Read Speed3.5 GB/s1050MB/s
Max Write Speed3500 MB/s1000MB/s
Form FactorPortablePortable External SSD
NAND TypeTLCV-NAND
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