What images have your tried on your microSD? What software did you use to write that image to your microSD? What steps did you take to attempt to flash the board?
I used dd. I did that on ArchLinux. I retried it on Gentoo and it worked. Perhaps there are issues with the kernel or dd used on ArchLinux. It was with some work for a big battery company, my current desktop is using Mate so I wanted to see if another one will get me more room. I have libreoffice and codeblocks installed. The flash is a bit small and I don’t want to use external micro SD, too easy for someone to accidentally disconnect it.
The internal flash should be much bigger …