If you serve numerous websites, you may want to configure the backing up
process so that it does not consume much server resources.
To reduce the server load and set the disk space usage policy:
- 
Go to Tools & Settings > Backup Manager > Settings. 
- 
(Optionally) Specify the maximum number of full backups that can be 
 stored in any type of storage (Maximum number of full backup files
 to store).For details, see The Rotation of Scheduled Backup Files below on 
 this page.
- 
Specify the number of simultaneous backup processes in the Maximum 
 number of simultaneously running scheduled backup processes. The
 default value is 10. Type a lesser value.
- 
To make the backup processes release resources to other processes on 
 the server, select one or both of the following settings:- Run scheduled backup processes with low priority
- Run all backup processes with low priority
 Note that these options increase the backup time. Other server tasks 
 will not work slower during the backup.
- 
Select the Do not compress backup files checkbox to disable 
 compression.
- 
To prevent the backing up processes from consuming all available disk 
 space on the server, choose one of the following:- 
Set Plesk to start a backup only if your server has enough free 
 disk space to store it. Be aware that this option significantly
 increases the backup time as Plesk additionally has to calculate
 the size of the future backup.Note: Plesk for Windows does not directly calculate object sizes but 
 takes them from the database. As object sizes in the Plesk
 database are updated only once a day, the overall calculated
 backup size can differ from its real value.
- 
Set Plesk to start a backup only if your server has the specified 
 amount of free disk space. This option is convenient when you know
 the approximate size of the future backup and do not want Plesk to
 waste time and resources on calculating it.
 
- 
- 
Choose whether to allow the use of Plesk server as an FTP storage for 
 Plesk backups.Users can configure their FTP storage to be located on the same Plesk 
 server where their subscriptions are hosted. If they do so, the
 amount of used disk space will double upon creation of each backup.
 This can eventually run the server out of free disk space. To prevent
 this, we recommend that you clear the checkbox Allow…