Review on Geekworm Raspberry Pi 4 mSATA SSD Adapter X857 V2.0, Raspberry Pi 4 Model B X857 V2.0 mSATA SSD Expansion Board USB3.0 Module for Raspberry Pi 4B UASP Supported ONLY" - Revised: "Geekworm Raspberry Pi 4 mSATA SSD Adapter X857 V2.0 with Raspberry Pi 4 Model B X857 V2.0 mSATA SSD Expansion Board USB3.0 Module - Raspberry Pi 4B UASP Supported EXCLUSIVELY by Kyle Pickett

I followed the instructions to install this board on RPi 4B and had no problem installing the m2 mSATA drive. Installing and starting the server took much longer due to my lack of knowledge of Linux, bcache and netatalk. This RPi now acts as a multi-user time machine server with an mSATA drive acting as a fast SSD cache and a larger 2.5" spinning hard drive bus-powered and the stores most of the data. To power the spinning drive I used a dual USB Y-type power harness that connects the drive to the RPi but is powered by the same Anker PS as the RPi. is powered, reducing the load on the RPi.