Cloud Backup
Storing a copy of image files on remote servers accessed over the internet.
Measured in
TB
In depth
Cloud storage satisfies the off-site requirement without any physical handling, and good services keep versioned copies that survive accidental deletion. The practical considerations are upload time for a large archive, ongoing cost, and the difficulty of a full restore — recovering ten terabytes over a domestic connection can take weeks.
Examples in practice
An initial upload of a 12 TB archive runs for six weeks, after which daily changes sync in minutes.