I want to switch from using crouton to using GalliumOS on my Chromebook. This means that I need to back up my stuff to an external drive. I want to use a flash drive for this purpose.
However, when I try to copy my files to it, I run into a problem. A lot of my files have a \ in their filename, due to a (probably stupid) system that I use. This is incompatible with both FAT32 and exFAT filesystems, so I want to format one of my flash drives as something else.
What filesystem should I use to do this that would allow for almost any character in the filename?