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 Michael Tran

Very stylish design! The first thing to know is that you can use a USB-A extension cable that connects to the top of the U adapter and an M.2 enclosure that connects to the bottom. Then plug it into your PC or Mac to burn the M.2 boot image (I used a 64-bit Ubuntu desktop). I mention this because I ordered another USB M.2 adapter for my PC. Save a few bucks and just use the method above! You may still need to use a microSD to update the Pi to boot from USB/M.2. I also ordered a full size microSD to SD tape adapter because I figured I could do some internal modifications and have an easily accessible SD slot. However, the inflexible part of the ribbon adapter protrudes from the front of the M.2 plastic underside. So this solution would be external and would really ruin the sleek design aesthetic. I could cut off a thin piece of plastic at the end so I can connect the ribbon cable as needed. Basically you can replace the microSD card without removing the 4 screws on the bottom. Overall I am very happy with this case. Setting the code for the fan and IR port was as easy as Pi. :D This case is so popular it also has some really interesting 3D printed interchangeable floors. Many thanks to Argon40 for such a good argument and for making the M.2 add-on a really good deal!