Compare WD_BLACK SN7100 4TB and Crucial P310 4TB: prices, speeds, $/TB. Which to buy in May 2026? Full spec breakdown.
Both the WD_BLACK SN7100 4TB and Crucial P310 4TB sit in the Gen 4 category at 4 TB, so the matchup turns on controller efficiency, cache topology, and current pricing rather than raw class differences.
Hardware-wise, the WD_BLACK SN7100 4TB runs on the SanDisk A101 — a more recent design from the WD/SanDisk lineup. The Crucial P310 4TB pairs Phison's E27T — a four-channel Gen 4 controller for HMB designs.
On warranty endurance the WD_BLACK SN7100 4TB carries 2,400 TBW against Crucial P310 4TB's 1,760 TBW. Both will outlast typical use, but the gap matters if you're doing professional content work.
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 Crucial P310 4TB wins this matchup on $/TB. Heavy write workloads — video editing, RAW photo libraries, backup operations — favor the WD_BLACK SN7100 4TB's 6,700 MB/s sustained write speed. Both drives use the 2280 form factor, which is too long for Steam Deck or ROG Ally — you'd need a 2230 variant if either manufacturer offers one, or a dedicated handheld-format drive instead.
Pick the WD_BLACK SN7100 4TB if you value a higher TBW endurance rating (2,400 TBW).
Pick the Crucial P310 4TB if you value the lower retail price ($299 vs $319), and better $/TB economics ($74.75/TB).