Simple Scheme - ACRONIS RECOVERY - FOR MICROSOFT EXCHANGE Manual

GFS (Grandfather-Father-Son) scheme will keep three sets of backups in the selected
location. This scheme, if chosen, is activated on the day the first full backup was
created: all backup archives (full and incremental) for the current week (7 days
starting from the day of creating the first full backup); one full backup for each week
of the current month; and finally one full backup for each month of the current year.
In this scheme months and years calculation is based on a lunar calendar (cycles of the
moon phase), i.e. one month is 28 days, one year is 13 lunar months (364 days).
You may also specify notification receiving, if free space in the backup location is
lower, that the selected size (in GB). You will receive an e-mail, but no archives will be
deleted automatically. To specify e-mail parameters, go to the Tools  Options (see
11.1 "E-mail Notifications" for more details).

7.4.2 Simple Scheme

Select Use the simple scheme option to specify the following parameters:
Minimum free space
Select this parameter to check the remaining free space and to specify the minimum
size in GB. With this option selected, you will be able to specify the minimum number
of full backups to keep and the minimum lifetime of archives to store (in days).
Maximum number of full backups
Select the Remove the oldest archives if the total number of full backups is
more than check box and type or select the maximum number of full backup archives
to store.
Maximum archive's lifetime
Select the Remove archives that are more than check box and type or select the
maximum number of days to store archives in the day(s) old box.
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