The WD Black SN770M is an M.2 2230 SSD designed for gaming handhelds, including the Steam Deck, ROG Ally, Legion Go, and Claw. It utilizes a PCIe 4.0 interface, offering sequential read speeds of up to 5,150 MB/s and write speeds of up to 4,850 MB/s. Currently, 2TB is the maximum storage capacity available for consumers in this form factor.

The drive launched three years ago with an MSRP of $219.99, though it typically retailed for around $239.99. During a recent storage shortage, market prices rose to between $349.99 and $399.99. The current pricing of $0.13 per GB brings the cost to approximately 8% above the pre-shortage retail level.

While the SSD is compatible with the Steam Deck, the device is limited to the PCIe 3.0 interface, making the drive's performance capabilities exceed the console's requirements. Despite the emergence of newer models like the Optimus GX 7100M, the SN770M remains a relevant option for handheld storage upgrades.