It's not the cheapest solution, but I have a Drobo for back up and it let's me sleep at night. After having many a back-up external drive fail, I settled on the Drobo, and it blows away the RAID array it replaced as far as ease of use. Oh yeah, and since it has 4 SATA drives that back all of the info up on itself, you can hot swap up to 3 failed drives and never lose any data. Truly a great invention, and easy to use.
Also, near infinite expandablity. As SATA drives get bigger, you can put bigger ones in, hot swap them, and lose no data.
Also, near infinite expandablity. As SATA drives get bigger, you can put bigger ones in, hot swap them, and lose no data.