WD_BLACK SN7100 4TB ($569) vs Crucial P310 4TB ($574). $/TB analysis, performance, and use-case recommendations.
WD_BLACK SN7100 4TB and Crucial P310 4TB are direct competitors — same generation, same capacity. Choose by controller behavior under sustained load, DRAM/HMB cache strategy, and $/TB economics.
Hardware-wise, the WD_BLACK SN7100 4TB runs on SanDisk's A101 controller, used in newer WD_BLACK SKUs after the SanDisk spinoff. The Crucial P310 4TB pairs an E27T controller built specifically for DRAM-less Gen 4 SSDs.
WD_BLACK SN7100 4TB earns higher TBW ratings (2,400 vs 1,760 TBW) — relevant for sustained write workloads, irrelevant for everything else.
Heading to a PlayStation 5? Both drives drop into the console's M.2 bay and report identical real-world benchmarks since the PS5 caps storage at PCIe 4.0 speeds. The WD_BLACK SN7100 4TB wins this matchup on $/TB. For content creators routinely rendering 4K or 8K video, the WD_BLACK SN7100 4TB's 6,700 MB/s sustained write is the deciding factor — multi-GB project files land noticeably faster than on the alternative. Note for handheld gamers: M.2 2280 is the desktop/laptop standard. Steam Deck and the ROG Ally line need 2230 drives — neither WD_BLACK SN7100 4TB nor Crucial P310 4TB fits without modification.
Zoom out from this pair for a moment. Among the 6 Gen 4 4 TB drives we track, the WD_BLACK SN7100 4TB ranks #3 by $/TB and the Crucial P310 4TB ranks #4. Neither cracks the top of the value table, so it's worth glancing at the alternatives below before picking either.
As of September 7, 2026, these tracked drives undercut both the WD_BLACK SN7100 4TB and Crucial P310 4TB on $/TB:
The WD_BLACK SN7100 4TB is the right call if the lower retail price ($569 vs $574), better $/TB economics ($142.25/TB), and a higher TBW endurance rating (2,400 TBW) matter to you.
The Crucial P310 4TB fits buyers who prefer its specific performance profile or have brand preference for Crucial.