You always hear people say ‘make sure you backup your data’. And I assure you, it is a wise piece of advice. Unfortunately you won’t know how valuable it is until you lose your data and don’t have a backup to restore from. I have been lucky as I have not lost data, but always keep multiple backups of my critical data just in case I have failures of any kind.
BUT, do your backups actually work? Have you ever tried to restore from your backups? You certainly don’t want to wait until your data fails, then try and restore from your backup and then find out the supposed ‘backup’ never really worked.