Sorry, but RAID is NOT a backup. It won't protect from overvolt damages, accidental deletion, system errors, data corruption or "Windows being dumb". The only thing it protects you from is an isolated fail of a single drive.
Vyse, if you want to make sure your data is safe, you want to have a look at the 3-2-1 strategy:
3 copies of the data on
2 different types of medium with
1 copy being stored offsite.
For this you could use 2 external hard disks you clone your SSD to (which satifies 3 and 2). Store one of the Disks at another location and swap them regulary. In the worst case (lightningstrike during backup / house burns down) you lose all data since the last swap. Also use 2 external disks from different manufactores, to make sure you don't have 2 disks from a bad batch.
And if you want to go really fancy to make sure you don't accidently delete data and only discover it after overwriting your backup drives, you can look at differential or incremental backups. I heard "borg backup" is quite good at this kind of backups, although I don't know how easy it is to use on Windows.
EDIT: Also try the recovery process, the earlier the better (as long as there are no data to loose). If you never tried wether restoring a backup works, you don't have a backup.