WD_Black SN7100 4TB NVMe SSD – Gen4 PCIe, M.2 2280, Up to 7,000 MB/s Read Speed, Up to 6,700 MB/s Write Speed, Next Gen TLC 3D NAND, for Laptops, Handheld Gaming Devices – WDS400T4X0E

WD_BLACK 4TB SN7100 – Best NVMe money can buy
I bought the WD_BLACK SN7100 4TB to replace my smaller WD SN570 Gen3 boot drive. Installation was straightforward i.e just slide it into the M.2 slot, and done.PerformanceUsing CrystalDiskMark V9.5.0, I consistently saw around 7000 MB/s read and 6200 MB/s write on the 4 GB test, and about 6800 MB/s write on the longer 64 GB run which was remarkably close to the advertised specs. Random 4K read/write speeds also feel quick, and Windows 11 boots in roughly 5–6 seconds. However, I did observe some throttling when running 64GB Q8T1 test with temperature reaching 59°C and speed dropping to 4500MB/S. Though, it’s still faster than any Gen3 drive. App launches are near-instant. I haven’t tested large game installs (like 100 GB titles) since this particular system isn’t built for heavy gaming, but for productivity and content creation, it’s been great so far.Thermals and EfficiencyIdle temperature hovers around 30°C but under sustained load, temperatures could reach up to 60°C and this is without a heatsink(except some black material came with the original laptop drive) which for a Gen4 drive is exceptional. The controller here isn’t just fast but impressively power-efficient. Compared to my older Samsung 970 EVO Plus Gen3, this one runs at a lower wattage. It’s a great fit for laptops or compact builds where cooling headroom is limited.Storage Capacity and SoftwareUsable space comes out to about 3.63 TB, which is standard for 4 TB drives due to the difference between base-10 and base-2 (1000 vs 1024) calculations. My only gripe is WD’s software. The legacy Dashboard app has been replaced by Kitfox, and the 4 TB SN7100 isn’t fully recognized yet. Hopefully, WD or SanDisk pushes an update soon, as the drive itself is fantastic. Also, it could be formatted for Windows, Linux or MacOS.Value and EnduranceThis drive uses TLC 3D NAND, unlike the WD SN5000 which is QLC-based(4TB version) and often priced just a few dollars cheaper. The SN7100 offers an endurance rating of up to 2400 TBW, which should easily outlast multiple system builds. If you plan to use it in a server or NAS, I’d suggest either keeping a backup drive(RAID 1) or going with WD Red SN700, which is designed for heavier write cycles. While it’s not the cheapest 4 TB Gen4 SSD, the performance easily rivals the Samsung 990 Pro and Crucial T500, with the added benefit of lower power consumption and cooler thermals.VerdictIf you’re upgrading from an HDD or even a SATA SSD, the SN7100 feels like a quantum jump. It combines blazing fast speed with stable thermals, and generous capacity in one package. This is an excellent choice for prosumers(creators, gamers) or anyone who’s looking for a reliable performance with minimal heat output.To conclude, if you’re looking for a drive that stays cool, handles large transfers without any hiccups, and just works; look no further. Highly recommended.

Great price, great product WD does not disappoint!!!!
This drive works absolutely perfectly! I am a big fan of WD, and this series fails not! the RW speeds are great, and I have response time that are not noticeable! The price is fair, and it is everything I expected! Thank you again WD!

Bad Drive … turned out to be a Good Drive
It appears this NVME is defective out of the BoxThis brand new ssd will not initialize. Package was unopened with seal the intact.I tried to Initialize it on a different desktop and a Dell laptop.I get the error “Fatal Device Hardware Error”.Returning it and getting another brand.Update to my previous review:The day before I was going to return it a friend of mine asked if he could check it out.I don’t know what he did but he got it initialized and formatted on his Linux computer.It appears to be working fine now with no issues and good speed.

Good solid storage solution for your data
I got this to expand the storage capacity of my MacMini. It was easy to install and came with everything I needed. So far, several months in, it’s not failed me, so I’m very happy with it. I haven’t always had great luck with Western Digital, but I think this was worth the gamble. I’ve had no heat issues whatsoever, and I was able to put my entire music library on it to free up space on my system. Design and function are as you’d expect.

J’ai déjà eu un WD black sn770, toujours fiable et rapide, celui là me paraît encore mieux! Je fais confiance à cette marque de disques éprouvée et sa solide réputation! Pour le boulot c’est un bon investissement

I installed this SSD in a Gen 3 laptop, knowing I wouldn’t reach full Gen 4 speeds, but wow, I still noticed a clear and satisfying improvement! This was my first SSD upgrade, replacing the stock 1TB Gen 3 drive that came with my system, and the boost in responsiveness and load times genuinely surprised me.Using a benchmark tool, I saw sequential read speeds around 3500 MB/s and write speeds over 3300 MB/s — right at the ceiling of Gen 3 performance! Even random access speeds were strong, which helped with smoother multitasking and faster game loading.One thing I didn’t expect at all: my laptop’s fan noise dropped noticeably! Compared to my previous SSD, this SN7100 runs about 5–7°C cooler under load, and even while playing the most popular gacha game and heavier AAA titles, the system stayed cool and quiet. That alone made me smile — less noise, more focus!Even though my system doesn’t support Gen 4, I’m glad I chose this drive. It’s ready for future upgrades and already performing impressively within Gen 3 limits. If you’re looking to upgrade from a stock SSD, this is a solid choice!

Hasta ahora ningun problema, funciona bien y tiene buenas velocidades