Hard Drives
Seagate Desktop HDD 4 TB SATA 6Gb/s NCQ 64MB Cache 3.5-Inch Internal Bare Drive ST4000DM000
Seagate 4000GB Internal HDD thousands if not millions of files can be backed up
https://www.bizrate.co.uk/harddrives/seagate-desktop-hdd-4-tb-oid15872180544.html