Backup icons

Backups may have compound icons with every element representing a backup property.

Normal backups have this icon: (pile of sheets).
Differential backups have this icon: (a sheet).
Automatic (scheduled) backups have the icon with a clock: .
If the backup has replica(s), the icon will have a blue sheet: .
Reserve backups have the icon with 'R': .
Stationary backups have a lock on the icon: .
If certain files were updated during a backup, the icon will have an exclamation mark: . Such backup may contain inconsistent data, so you should use them with care.
Incomplete backup has a white cross on the icon: . An incomplete backup does not contain all necessary files, and it may be created if some of the source files were locked during backup. It is recommended that you do not restore such backups.
Imported backup has the following icon: .
A backup with unknown properties will have the icon with a question mark: .

Certain backups may have compund icons, like this one:

. It shows that the backup is differential and automatic.