Creating Plesk backup to remote storage fails: Not enough free disk space to backup selected objects

Symptoms

• On a Plesk server, creating a backup to remote storage in Tools & Settings > Backup Manager fails:

  PLESK_ERROR: Not enough free disk space to backup selected objects. At least 231208.573798 Mbytes free disk space is required.

• The option Start the backup only if your server has the sufficient amount of free disk space (this option may significantly increase the backup time) in Tools & Settings > Backup Manager > Backup Settings is enabled.

Cause

Insufficient disk space on the Plesk server.

Resolution

Allocate additional disk space to or remove unnecessary files in the Plesk backup location - by default, it is /var/lib/psa/dumps on Linux and %plesk_dir%Backup on Windows.

Disable the option Start the backup only if your server has the sufficient amount of free disk space (this option may significantly increase the backup time) in Tools & Settings > Backup Manager > Backup Settings to make Backup Manager not count overall disk space required for the backup.