From what I understand it doesn’t work on any of the mobile apps which is unfortunate, but I guess that is the price we pay for not wanting to just use the web browser

The limit on formatting drives as fat32 is 32GB on windows though anything above 32GB and you have to go find a 3rd party tool to convert larger disks to fat32

I know at least at the start some users were confused by the federation process and created 10+ accounts to “subscribe” to other instances plus there have been bots signing up through smaller instances without capcha or email verification so that might explain the discrepency