UPDATE Jan 31 2021: I updated from Pi OS Buster to Bullseye which broke the Geekworm fan control. The only way to get it going again was to do a fresh installation.
This was a fun albeit unnecessary project that costs a few bucks. I wanted to build a small portable NAS around a Raspberry Pi 4.
I ended up buying parts to create a polished, professional looking solution that utilizes a SATA 2.5″ SSD. Here are the parts I bought:
- Geekworm X825 version 2.0 SATA expansion board $30
- Geekworm X825 version 2.0 metal case and power switch $26
- Geekworm X735 version 2.5 Power Management and Cooling Fan board $28
- Raspberry Pi 4 with 8GB RAM $75
- Crucial 2TB SSD $173

Geekworm Stuff
This is a good looking case and I obviously have the front panel off of it for this picture.
There are a few things you need to know about this set up though. It may or may not be the solution for you.
First the case fit and finish is beyond exceptional. The SATA board is excellent for mounting the SSD on the bottom side and pogo pins make the appropriate connections to the Pi.
Make no mistake though. The SSD is connected via the USB 3.0 bus. And herein lies the rub.