Capacity
WD BLACK SN7100 1TB1000 GB
WD BLACK SN7100 2TB2000 GB
SN7100: 1 TB or 2 TB?
Editorial specification comparison · checked 23 October 2026
Capacity deserves its own comparison. These SN7100 variants have equal advertised peak speeds, but different storage space and TBW limits. The 2 TB model provides twice the nominal space and a higher write limit.
The manufacturer describes the series as DRAM-less with TLC NAND. This alone does not decide suitability for every workload. Look for post-cache measurements when sustained writing matters.
Price per TB compares shop totals on equal capacity units, and appears only with a confirmed total for your destination. Also consider whether one larger drive is preferable to using another slot; slot availability and cooling need separate verification.
Compare all specification differences ⇄What changes?
The differences at a glance
Manufacturer facts for these exact variants. The order does not declare a performance winner.
Endurance
WD BLACK SN7100 1TB600 TBW
WD BLACK SN7100 2TB1200 TBW
BLACK SN7100 1TB: 1 unknown fields · BLACK SN7100 2TB: 1 unknown fields. Unknown does not mean absent.
Compare capacity and cache, not just peak speed
Manufacturer speeds are maxima under stated test conditions. They do not show sustained writing after the cache fills. TBW is a write-endurance warranty limit, not a predicted failure date; time limits also apply. Check M.2 length, interface and heatsink clearance in the host manual. Price per TB uses nominal decimal capacity and a confirmed delivered total.