Domain got into Suspended status with the following message:
Domain has exceeded its limits and was suspended
Backups are stored in a server repository
Server-wide backup created in Backup Manager > Backup is included into disk space of a domain and is visible in Domains > example.com > Backup Manager.
For instructions how to decrease domain disk space usage, visit:
111694 [How to] Exclude server-wide backup from subscription's disk space statistics
Note: For Plesk 9.x it is only possible to exclude all backups from disk space calculation.