I'm also having trouble backing up Preset banks (FX8 Mark II with FW 5.04 and Bot 2.8.4 and 2.8.5). I can backup individual presets just fine. I think it even backed up everything/system a couple weeks ago. BUT I cannot backup Individual preset banks. The progress bar goes to 16%, then drops to 0% and the text is stuck on "Now receiving: Preset Bank A". The FX8 gets stuck with "Bank Transfer in Progress" . After that I can restart fractal-bot, but can't do anything with the Fractal-Bot until rebooting the FX8 because of a time out error. This is on Mac High Sierra with a 2011 iMac.
About 1 week - 10 months or more. Fractal is a fairly small operation and updates are dictated by priority and necessity. If the backup bug is an issue, use the previous firmware, if not use the current. They both sound incredible.new user here, whats the usual update cycle for firmwares?
FractalBot is up to 2.9.2 now. Have you guys updated FractalBot and tried 5.04 again?