So after reading up on #filesystems, I've attempted to put UDF on my microSD. Whilst it is best known as the filesystem on CDs/DVDs, you can put it on USB storage devices as well. It does have some caveats when you do (you have to jump through some hoops to have the best compatibility¹).

I've tried to do it manually, but tomorrow I'll see if I can get this¹ script to work;

1) https://github.com/JElchison/format-udf

#TinkeringWithLinux #Linux (also applicable for #Windows & #macOS btw)