Amazon.com: Geekworm for Raspberry Pi 4, X857 V2.0 mSATA SSD Expansion Board + X735 V3.0 Power Management with Safe Shutdown & PMW Cooling Fan Expansion Board (Not Include Raspberry Pi 4) : Electronics
M.2 - Wikipedia
M.2 - Wikipedia
Solid-state drive - Wikipedia
All about SSDs - Restarters Wiki
X855 SKU: EZ-0083 - 52Pi Wiki
M.2 - Wikipedia
mSATA VS M.2: What's the Difference Between mSATA and M.2 SSD