Do you rely on RAID as your NAS backup?

I just had a 3 Tb External Hardrive fail.

Luckily I had it backed up by another hardrive.

Now, I have a 3rd hardrive that is also a back up. Plus many 64-128 GB flash drives as back up.

When you down load HIRez tracks you need several backups in case of failure. Non hirez from Cd’s can always be copied to the hardrive again.

I keep wondering about adding a NAS but they seem to be quite expensive compared to external hardrives.

Not sure what a Raid is...

Thanks for the help. It was a Western Digital 3TB that failed. I need more education on the different back up options.

Quick question: My source is a Bryston BDP-2 usb player. I like to leave the player on all the time so its ready to play. I thought that the hardrive goes into sleep mode when not being used. But, since the hardrive had failed now I am wondering if it would be better to turn off the BDP-2 when not being used.

The external hardrive blinks and the BDP-2 screen goes dark after a period of inactivity.