We, at Frankenstein Computers, recommend that you keep your backup files in different locations. We recommend using (2) identical external hard drives to back up to. You should swap out the external drives weekly so you have an onsite and office copy of your data. This also allows you to go back (2) weeks to find any data that might have been deleted by accident. We also like Carbonite. It costs about $60 per year and is a good option for another offsite backup. ALL hard drives will eventually FAIL. Make sure you data is safe and it will not be an issue.