This is going offtopic, but if you're going to do backup/NAS, check your logs! I'm going to see how much I have to learn to set up monitoring on my home network. An error from Windows (coming from Samba) that I dismissed as a Samba problem was actually an early warning of the drive failure.

Edit: ouch.

  root@kiwi:/media/files2# ls -lah
  total 12K
  drwxrwxrwx  3 nobody backup 4.0K Dec 22 22:19 .
  drwxr-xr-x  5 root   root   4.0K Dec 30 20:19 ..
  drwx------ 32 root   root   4.0K Dec 31 00:54 lost+found

This was on my todo for years. I never liked the idea of using a cloud solution for privacy and price reasons. I recently bought a QNAP NAS which provides amazing custom backup solutions. I raided the disks, and continuously backup all personal data directly to AWS Glacier, making sure to encrypt it first. Private and very cost effective since the only time I would need to retrieve from glacier would be in case of both local drives failing (theft, fire?) I sleep better at night now.