The WD_Black SN7100 4TB is down to $546 on Amazon right now - that's $834 off the $1,380 list price, or about 60% off. Before you get too excited about that number, some context.
About That "60% Off"
Let's be honest: the $1,380 list price is inflated. Nobody was paying that. The SN7100 launched in early 2025 and the 4TB model has been hovering in the $550-600 range at retail. So this isn't an $834 savings in any real sense, it's closer to the going rate for this drive, maybe slightly below where it's been sitting.
That said, $546 for 4TB of solid Gen4 NVMe storage is still a decent price. That works out to roughly $137 per terabyte, which is competitive for a WD_Black drive with this kind of performance.
What You're Getting
The SN7100 is WD's latest Black-series Gen4 drive using next-gen TLC 3D NAND. Key specs:
- 4TB capacity, M.2 2280 form factor
- 7,000 MB/s sequential read / 6,700 MB/s sequential write
- PCIe Gen4 x4 interface
- TLC NAND (not QLC — better endurance for sustained writes)
Those read/write speeds essentially max out the Gen4 interface. You're not leaving performance on the table compared to pricier Gen5 drives in most real-world scenarios — game load times between Gen4 and Gen5 are nearly identical. The TLC NAND is the important detail here. Cheaper 4TB drives often use QLC, which tanks write speeds once the SLC cache fills up. TLC holds up better for sustained transfers like moving large game libraries or video editing.
The Catch
WD has confirmed endurance specs for the SN7100 lineup, and the numbers are solid, ranging from 300 TBW for the 500GB model all the way up to 2400 TBW for the 4TB capacity. For a game drive, that's more than you'll ever need. And if you're planning heavier write workloads beyond gaming, the 4TB model's 2400 TBW rating should comfortably handle production-level use as well.
The other thing: this is a Gen4 drive. If your motherboard has a PCIe 5.0 M.2 slot and you're buying fresh, a Gen5 drive like the Crucial T705 4TB will give you higher sequential throughput, but you'll pay significantly more for gains that barely show up in game loading. Gen4 is the sweet spot for price-to-performance right now, imo.
How It Compares
At the 4TB tier, your main alternatives are the Samsung 990 EVO Plus 4TB and the Crucial P3 Plus 4TB. The Samsung typically runs $20-40 more but offers proven endurance ratings and Samsung's Magician software. The Crucial P3 Plus is cheaper but uses QLC NAND, fine for a game library, less ideal for anything write-heavy.
The SN7100 at $546 slots in as a solid middle ground: TLC endurance, near-max Gen4 speeds, and WD_Black branding with the dashboard software to match.
Who This Is For
If you're running out of SSD space and want one drive to hold your entire Steam library without worrying about write degradation, this is a solid pick. It's also a decent option for the ROG Ally or Steam Deck crowd who want to swap in maximum storage via M.2 2280.
Not the cheapest 4TB NVMe you'll find, but TLC at this capacity for under $550 is decent. Check the current price at Amazon — just ignore that inflated list price.
About the author: Staff writer at Wccftech. Love F1, PC hardware and AI/ML. Covering the hardware and general technology beats with a dribble of software.
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