I setup BTRFS RAID1 on my NAS recently, here’s what I gathered on BTRFS RAID levels:

• RAID1 vs RAID10:
  • RAID10 theoretically offers better performance (stripping), but the BTRFS implementation isn’t well optimized so you don’t get that much of a performance boost compared to RAID1.
  • RAID1 may also waste less disk space when using disks of different sizes compared to RAID10, here’s a simulator to check: https://www.carfax.org.uk/btrfs-usage/ . In your case it doesn’t matter since all your disks are the same size.
• RAID5/6:
  • It’s not only the write-hole, scrubbing is also broken (huge read amplification make performance unusable on large file systems).
  • RAID5/6 is slower than everything else (not a BTRFS problem, it’s just parity calculations).
  • I believe the BTRFS developers are getting (relatively) closer to fixing RAID5/6 these days, but they still don’t recommend using it. Switching between BTRFS RAID modes can be done pretty easily later without creating a new filesystem, so you could always switch to it later once it’s fixed.

In your case, I’d probably use RAID1 or RAID10 for data, and RAID1c3 for metadata.

EDIT: just saw that you don’t care that much about losing the data. In that case you don’t need any fancy RAID thing, as someone else said just add all your disks in single mode (the default), way simpler and you don’t lose any disk space.

Removed by mod

There’s hotkeys for workspace navigation, I use them all the time: Super+Alt+Left/Right will navigate to the next/previous workspace (Super+PageDown/Up also works). If you go in Settings -> Keyboard shortcuts -> Navigation you’ll find more, notably to move windows between workspaces.

As for the fullscreen by default, there’s extensions for that I guess, though personally it doesn’t bother me since after the window is maximized once it should restore its maximized state the next time it’s opened. With Super+Arrow keys to position the window, I personally barely use the mouse for window management.

Qalculate!, the calculator I use every time I need to do a calculation, especially if it involves units or currency conversion. Does everything I’ve ever needed out of an everyday calculator (even symbolic calculation and exact results), while keeping the usual simple calculator interface.

The Nextcloud AIO container itself doesn’t have access to the backup directory, but it has access to the docker socket (/var/run/docker.sock). Having access to the docker socket means it can perform any docker operation on the host system, in this case starting a separate backup container with the backup directory mounted.