Well, RAID is in fact very cool.... but usually requires an appliance, and the appliance itself can fail.
If you need high throughput access to a lot of storage, go with raid.
If you just need to back up your PC periodically, a single external disk will work.
If you need high throughput access to a lot of storage, go with raid.
If you just need to back up your PC periodically, a single external disk will work.