Acronis True Image 2017 NG - Manual (Page 21)

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2.9 Backup retention rules
Every time you run a backup operation, manually or on a schedule, Acronis True Image 2017 creates
a new backup version in the backup location. By default, Acronis True Image 2017 stores 20 recent
versions. This rule applies to both Acronis Cloud and local or network folders. When you create the
twenty-first version, Acronis True Image 2017 automatically deletes the oldest version of the backup.
You can change the default value and set a different limit on the number of backup versions.
In addition to the number of versions, you can limit their age. Select the Delete version older than
check box, and then specify how long to store a version. All versions that are older than the specified
period will be automatically deleted.
2.10 Excluding items from backups
Before you start a backup, you can reduce the backup size by excluding data that does not need to be
backed up.
You can exclude files and folders the following ways:

Manually, from any backup
To exclude an item, specify it explicitly or use a mask.

Automatically, from a backup to Acronis Cloud
Acronis True Image 2017 analyzes the backup source and suggests that you exclude your local
data that can be downloaded from third-party Cloud storage.
Excluding items manually
To exclude files and folders manually: