BiWin CL100 Mini SSD: Compatible Handhelds, Speeds, Prices and Key Buying Caveats

What the CL100 Mini is​

BiWin's product page gives the drive's dimensions as 15.0 × 17.0 × 1.4 mm. It describes the drive as about the size of a small coin or a microSD card. It uses PCIe 4.0 x2 and NVMe 1.4, with rated sequential reads up to 3,700 MB/s and writes up to 3,400 MB/s. Capacities run from 512 GB to 2 TB.

The sequential-write figure is not the same across the range. BiWin's specification table, as reproduced by ThinkComputers, lists the 512 GB model at up to 2,400 MB/s for writes. The 1 TB and 2 TB models are listed at 3,400 MB/s. The same table lists the drive as DRAM-less, and BiWin's page mentions Host Memory Buffer support.

Other rated figures from BiWin's page:

• The 1 TB and 2 TB models are rated at 550K random-read IOPS. The 512 GB model is rated at 450K.
• Warranty is three years or a capacity-based write limit, whichever comes first: 375 TBW for 512 GB, 750 TBW for 1 TB and 1,500 TBW for 2 TB.
• BiWin claims IP68 dust and water resistance, plus survival of drops from up to 3 metres.

Not a microSD card, and not a universal M.2 replacement​

The CL100 looks like a microSD card but is not one, and it does not go in an ordinary M.2 slot. It is a distinct Mini SSD format. BiWin's July 2026 user guide says it fits handhelds and compact devices that have a Mini SSD slot. It tells buyers to confirm that their device supports the Mini SSD form factor and the capacity they choose.

The guide names these devices as having built-in Mini SSD slots:

• GPD WIN 5
• OneXPlayer X1 Air 3-in-1 PC
• OneXPlayer Super X
• OneXPlayer Super V
• OneXPlayer 3
• OneXFly APEX
• OneXFly APEX Air
• OneXPlayer X2 Mini

That matches the list in Tom's Hardware's report. Tom's Hardware also suggests the drive "can probably be made to fit other gear". That is speculation, and BiWin's own documentation doesn't back it. If your handheld isn't on the list, treat the drive as incompatible until its maker says otherwise.

The comparison with a Steam Deck-style M.2 2230 drive holds up on size. The 2230 is 22 × 30 mm and needs the case opened and a screw. On a supported device, BiWin describes insertion as three steps: open, insert, lock.

Using it as an external drive​

BiWin sells a separate RD510 Mini SSD Reader for use outside a handheld. BiWin's announcement describes the RD510 as a USB 4.0 reader that enables 3,300 MB/s access. Tom's Hardware says speeds through the reader are limited to about 3,000 MB/s in either direction. Both figures sit below the drive's top internal claims.

BiWin's user guide says the reader supports Windows 10/11, macOS 11.0+, iOS 17.0+, PlayStation 5 software 08+ and several Android-family systems. That is the reader's compatibility. It is separate from the list of devices with built-in slots. BiWin's Biwin Intelligence management software also supports the CL100. It handles performance tests, data migration and firmware updates, and it is listed as Windows 10/11 only.

Pricing, as reported​

Tom's Hardware reports these euro prices on Amazon as of 2 October 2026:

These are retail prices that change with the seller and the day. I could not independently confirm the full set, so treat them as one outlet's snapshot. Tom's Hardware judges the 512 GB and 1 TB prices to be roughly in line with equivalent M.2 2230 drives from reputable makers. It calls the 2 TB price arguably disproportionate. Earlier coverage from TweakTown put launch pricing from the Chinese retailer JD.com at about $85 for the smallest model and over $300 for the 2 TB, which suggests European prices carry a premium.

Caveats before buying​

• Peak figures only. The speeds are manufacturer maximums. BiWin's own FAQ says real speeds vary with the controller, host device, file size and workload.
• Unverified internals. Tom's Hardware names a Silicon Motion SM2268XT2 controller and a single Samsung V8 TLC NAND package. I found no confirmation of either in BiWin's product page or specifications, so treat them as the outlet's claim. Nor did I find independent benchmarks showing real-world game-loading gains. A ThinkComputers review exists, but I only saw its specification table.
• Bundled ecosystem. If your handheld takes M.2 2230 drives, the CL100 gives you nothing there. It only matters if your device has the slot.
• Backups. BiWin's guide says its warranty covers hardware faults only, not lost data. Back up anything important.

Bottom line​

For owners of a GPD Win 5 or one of the listed OneXPlayer machines, the CL100 offers tool-free storage expansion with NVMe-class rated speeds, which a microSD card can't match. For everyone else, it's a curiosity until the Mini SSD format spreads beyond BiWin's partner devices. Check your exact model and its supported capacity first, then compare the premium with the storage options your handheld already supports.