NAS (Network-Attached Storage) server can sit in the loft or a shed in the garden and act as a backup drive for all the computers in the house, supporting: CIFS (samba), FTP, NFS, AFP, RSYNC, iSCSI protocols, S.M.A.R.T., local user authentication, Software RAID (0,1,5) with a Full WEB configuration interface.

You can have any size and has a wireless connection.