Form factor code, PCIe generation and lane count, before any speed figure · review
SanDisk WD_Black SN7100 1 TB, a drive its own page says is replaced review
The fastest writer on this shelf at 6,900 MB/s, with 7,250 MB/s read in M.2 2280 — on an Amazon.com page whose first bullet says the drive has been replaced by a newer generation.
The title: WD_Black SN7100 1 TB, Gen4 PCIe, M.2 2280, up to 7,250 MB/s read and 6,900 MB/s write, TLC 3D NAND, for laptops and handhelds, WDS100T4X0E. The bullets: the drive has been replaced by the SANDISK Optimus GX 7100; the speeds, for the 1 and 2 TB models, and up to 35% faster than the previous generation; Gen 4 and TLC NAND; up to 100% more power efficiency; the WD_Black Dashboard software for Windows; and the manufacturing by Sandisk.
The shelf it sits on
Drive
Interface
Read
Write
Also published
Amazon.com, October 26, 2026
Intenso M.2 PCIe Premium
Gen 3 ×4, NVMe 1.3
2,100 MB/s
1,700 MB/s
—
$151.41
KingSpec XG7000
Gen 4
7,400 MB/s
6,600 MB/s
600 TBW, 3-year warranty, TLC
$168.99
BIWIN Black Opal NV7400
Gen 4 ×4
7,450 MB/s
6,500 MB/s
1,000K IOPS, HMB, heat sink, TLC
$174.99
Crucial P310
Gen 4
7,100 MB/s
6,000 MB/s
Acronis offer, G8 NAND
$179.97
Acer Predator GM7
Gen 4 ×4, NVMe 2.0
7,400 MB/s
6,500 MB/s
HMB + SLC cache
$179.99
WD_Black SN7100
Gen 4
7,250 MB/s
6,900 MB/s
TLC; listing says it has been replaced
$188.95
Samsung SSD 990
Gen 4 ×4, NVMe 2.0
7,150 MB/s
6,450 MB/s
1,100,000 random write IOPS, 3-year warranty
$281.50
Lexar EQ790
Gen 4 ×4, NVMe 1.4
7,000 MB/s
6,000 MB/s
HMB + SLC, 5-year warranty
no offer
All eight are 1 TB in the M.2 2280 format.
A page that points elsewhere
The first bullet is a replacement notice. Buying the SN7100 now is buying the previous model; the page itself suggests looking at the successor.
What is not published
A TBW rating, an MTBF and a warranty term.
Prices quoted in this text were read on October 26, 2026. The live price is at the top of the page.
Where it holds up, and where it stops
Strengths
6,900 MB/s write, the highest on this shelf, with 7,250 MB/s read
TLC 3D NAND named
Power efficiency stated as up to double the previous generation, for laptops and handhelds
Compromises
The first bullet says the drive has been replaced by the SANDISK Optimus GX 7100
No TBW, MTBF or warranty term
$188.95 on Amazon.com on October 26, 2026, the second-highest price here
Specifications
Capacity
1 TB — stated in the title
Form factor code
M.2 2280 — stated in the title
PCIe generation
Gen 4 — stated in the title and the third bullet
Lane count
Not published on the Amazon.com listing
Stated sequential read figure
Up to 7,250 MB/s — stated in the title and the second bullet, for the 1 and 2 TB models
Stated sequential write figure
Up to 6,900 MB/s — stated in the title and the second bullet, the highest on this shelf
Stated random IOPS
Not published on the Amazon.com listing
TBW rating
Not published on the Amazon.com listing
Stated MTBF
Not published on the Amazon.com listing
Warranty length
Not published on the Amazon.com listing
DRAM cache
Not published on the Amazon.com listing
Heatsink
Not published on the Amazon.com listing — none is named
Amazon reference
B0DN7CYYSD
EAN
0718037893204
On Amazon.com
Amazon.com had an offer at $189 on October 26, 2026.
The questions that come up before an order
Is it discontinued?
The first bullet says it has been replaced by the latest generation and points to the SANDISK Optimus GX 7100. Amazon.com still sold it on October 26, 2026.
Why SANDISK on a WD_Black drive?
The last bullet says WD_Black, WD Blue and WD Green flash products are made by Sandisk and distributed under licence from Western Digital.
Our score
7.4/ 10
The fastest writer on this shelf, sold on a page that recommends its successor. The warranty and endurance figures are not given.
Against the rest of the network and storage gear
This network and storage gear share the category and the price bracket. Only what each one states is shown; an incomplete column would mislead.
Model
Price
Form factor code
PCIe generation
Lane count
Stated sequential read figure
SanDisk WD_Black SN7100 1 TB, a drive its own page says is replaced
$189
M.2 2280 — stated in the title
Gen 4 — stated in the title and the third bullet
Not published on the Amazon.com listing
Up to 7,250 MB/s — stated in the title and the second bullet, for the 1 and 2 TB models
Gen 4 — stated in the title as Gen4x4 and PCIe 4.0
Four — stated as Gen4x4
Up to 7,450 MB/s — stated in the title and the first bullet, the highest on this shelf
What separates the models, in network and storage gear
If price decides: BIWIN Black Opal NV7400 1 TB, the fastest read on this shelf, at $175.
Highest Stated sequential read figure in the table: BIWIN Black Opal NV7400 1 TB, the fastest read on this shelf (Up to 7,450 MB/s — stated in the title and the first bullet, the highest on this shelf).
The buyer this one serves, among network and storage gear
A laptop or handheld where the highest write speed on this shelf matters — or, as its own page suggests, the newer Optimus GX 7100.
What this one costs among network and storage gear
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom, United States. Listed is not the same as in stock — availability changes daily.
Details checked on October 26, 2026.
What buyers actually choose
Amazon reports what buyers took in the month before this page was last checked: at least 1,000.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Sources
Specifications: the manufacturer sheet for network and storage gear and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
A Gen 4 ×4, NVMe 2.0 drive with 7,400 MB/s read and 6,500 MB/s write, HMB and an SLC cache, and thermal management named — and no endurance or warranty term on its Amazon.com page.
Best for: A desktop or laptop Gen 4 slot where the cloning software and NVMe 2.0 are useful and the warranty can be confirmed separately.
1 TB · M.2 2280 · PCIe Gen 4 ×4 · 7,450 MB/s read · 6,500 MB/s write · 1,000K IOPS · HMB · 0.5 mm heat sink · no TBW or warranty
A Gen 4 drive with the highest read figure on this shelf, 7,450 MB/s, a random figure of up to 1,000K IOPS and a thin heat sink — and no endurance rating or warranty term on its Amazon.com page.
Best for: A desktop or laptop Gen 4 slot where the highest read figure on this shelf is wanted and a written warranty is not essential.
1 TB · M.2 2280 · PCIe Gen 3 ×4, NVMe 1.3 · 2,100 MB/s read · 1,700 MB/s write · no endurance, warranty or cache figure
The only Gen 3 drive on this shelf and the cheapest at $151.41 on Amazon.com on October 26, 2026: 1 TB in M.2 2280, 2,100 MB/s read and 1,700 MB/s write, and no endurance, warranty or cache figure.
Best for: A machine with a Gen 3 M.2 slot, where a Gen 4 drive would run at Gen 3 speed anyway.
