Review on Argon ONE M.2 Raspberry Pi SSD Board (Expansion Board ONLY) - Supports B-Keys and B+M Keys - Exclusive Compatibility with Argon ONE V2 Raspberry Pi 4 Cases by Tom Plowman

This case is needed to keep the top of the Pi 4 open and accessible. Lots of problems: the 4 included screws don't fit/work anywhere (they slip right through the Pi and the case's mounting holes). I have no idea why they even bothered to include the screws or what they are for. Only two holes fit for mounting the Pi (again, choose the screws), I had two M3 screws and nuts and let them work on only one side of the Pi for an unstable mount. There is no microSD access slot - you must use the microSD before switching to boot from SATA. So once you've mounted the board, you'll need to unhook it to get back at the card. The Pi's ports are also very close to the M.2 drive components, exposing power/HDMI/audio connections to a risk of physical contact/shorting as well as PCB components on top of the drive. .2 run with a piece of electrical tape to minimize this risk (but this may result in more heat).