The WD_Black SN7100 1 TB NVMe drive, made by SanDisk under licence from Western Digital, and two USB flash drives: the Ultra 512 GB and the Ultra Flair 32 GB.
The NVMe drive
The fastest writer on the NVMe shelf at 6,900 MB/s, with 7,250 MB/s reading, TLC NAND and the M.2 2280 length. Its Amazon.com page opens with a notice that the drive has been replaced by the SANDISK Optimus GX 7100, and it states no warranty or endurance figure.
The flash drives
The Ultra 512 GB states a five-year limited warranty — the longest on the flash drive shelf — with password protection and file encryption, and a read figure of 130 MB/s with no write figure. The Ultra Flair quotes 150 MB/s and then gives an example, a 1.2 GB film in under thirty seconds, that works out at about 40 MB/s writing.
1 TB · M.2 2280 · PCIe Gen 4 · 7,250 MB/s read · 6,900 MB/s write · TLC 3D NAND · replaced by the SANDISK Optimus GX 7100
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shelf at 6,900 MB/s, with 7,250 MB/s read in M.2 2280 — on an Amazon.com page whose first bullet says the drive has been replaced by a newer generation.
Best for: A laptop or handheld where the highest write speed on this shelf matters — or, as its own page suggests, the newer Optimus GX 7100.
A metal thirty-two-gigabyte drive quoting 150 MB/s and then publishing the arithmetic that reduces it: a 1.2 GB film in under thirty seconds is about forty megabytes a second.
Capacity
32 GB — stated in the title and in the reference. The first bullet’s footnote adds that performance varies by drive capacity, which means the headline figures belong to the range rather than to this version
USB generation
USB 3.0 — stated in the title and in the first bullet, which requires a USB 3.0 port for the quoted speed and notes that performance may be lower depending on the host
Stated link rate
Not published on the listing — no figure in gigabits per second appears, only the generation name
Connector type
Type-A — implied by the body and never designated on the page
Stated read figure
Up to 150 MB/s — stated in the first bullet and its footnote, which says plainly that 150 is the read speed and that it varies by drive capacity.
Stated write figure
Given as a multiple and then undercut by the page’s own example — the first bullet’s footnote gives writing as up to fifteen times a standard USB 2.0 drive at 4 MB/s, which is about 60 MB/s. The second bullet’s footnote gives a 1.2 GB film in under thirty seconds, which is about 40 MB/s. Both are published and neither is chosen
Body design
A sleek, durable metal casing — stated in the fourth bullet. At 4 g (0.1 oz) and 13 by 42 by 7 mm (0.28 in) it is the lightest drive on this shelf. Whether a cap is fitted is not stated
Keyring provision
Not published on the listing — no loop, no lanyard hole and no clip is named anywhere, on a drive small enough to lose
Stated ingress rating
Not published on the listing — no water rating, no dust rating and no IP figure appears
Warranty length
Not published in the bullets — the description names a five-year limited term for the range and the bullets do not restate it, so the figure is attached to the family rather than printed as this listing’s own specification
Amazon reference
B015CH1JIW
EAN
0619659136697
Publishes the arithmetic that corrects its own headline: a 1.2 GB film in under thirty seconds is about 40 MB/s, against the 150 on the front
Names the encryption properly — 128-bit AES, with the Windows and macOS versions it works on and the Mac download it needs
The headline 150 MB/s is a read figure for the range, and the page’s own example implies about 40 MB/s writing on a real file
Best for: A small, solid drive for documents and photographs, bought with the thirty-second film example in mind rather than the number on the front.
Five years of warranty, the longest stated for a drive on this shelf, on the joint-largest capacity here — with password protection and a read figure of 130 MB/s against the 200 of the fastest.
Capacity
512 GB — stated in the title. It is the joint-largest capacity on this shelf, shared with the PNY Elite-X Fit. The description defines 1 GB as 1,000,000,000 bytes and notes that actual user storage is less, without giving the figure
USB generation
USB 3.0 — stated in the first bullet, which requires a USB 3.0 port for the quoted speed, with backwards compatibility to USB 2.0 in the second
Stated link rate
Not published on the listing — no figure in gigabits per second appears, only the generation name
Connector type
USB-A, designated in the title — which several of the seven listings on this shelf leave to be inferred. On a shelf where Type-C and dual-connector drives exist, printing it is the difference between a sure purchase and a return
Stated read figure
Up to 130 MB/s — stated in the first bullet with five qualifications: ten times a standard USB 2.0 drive at 4 MB/s, a USB 3.0 port required, based on internal testing, performance possibly lower depending on the host, and 1 MB defined as 1,000,000 bytes. It is the most carefully hedged speed claim on this shelf
Stated write figure
Not published on the listing — no writing rate appears in the title, the three bullets or the description. The single figure published is the read figure, as the first bullet states
Body design
Not described beyond the connector — the description calls it sleek and sturdy and names no cap, collar or retraction. At 8 g (0.3 oz) and 11 by 22 by 8 mm (0.31 in) it is the second-lightest drive on this shelf
Keyring provision
Not published on the listing — no loop, no clip and no lanyard hole is named anywhere
Stated ingress rating
Not published on the listing — no water rating, no dust rating and no IP figure appears
Warranty length
Five years, limited — stated in the description. It is the longest term stated for a drive on this shelf, where three listings publish none, one twelve months and one a year; the Ultra Flair's description names five years for its range
Amazon reference
B083ZLJ5MG
EAN
0619659179397
Five years of warranty, the longest term on this shelf
The joint-largest capacity here at 512 GB, and $0.234 a gigabyte
No write figure, so the single published number is the read speed and the slower direction is unstated
Best for: Half a terabyte on a key that has to be covered by a term rather than a hope, with a password on the files.
