If you really care about your data you should be using a file system with checksums but in my experience btrfs is prone to fail if the hardware is not reliable.

If you really care about your data you should be using a file system with checksums but in my experience btrfs is prone to fail if the hardware is not reliable. About two years ago I tried it with second hand hdds thinking it would be good for checking the reliability of the drives. After writing some data in one of them and a reboot it failed to mount it again, total data loss while it would have been at most a partial data loss if using ext4 thanks to fsck. This happened 2-3 times as I was testing and didn't care about the data, on ext4 no issues at all. Still using btrfs as the root fs on a new ssd, the snapshots are really useful for backups, no problems in two years. But for reliability I would try zfs instead.