Is the default Steelcentral backup failing or some other backup method?
Steelcentral automatically backs-up each device it manages. The daily backups are kept for 30 days, with a monthly kept for longer retention.
In Manage-Operations-Backup/Restore, select the pulldown menu for 'Source Appliance'. All available snapshots for that appliance will be shown in the 'Restore Operation' section. If you want to view the config contained in that snapshot, just expand the > and you can view the contents.
If you back up the controller to an external location, you can choose if it's just the SCC or appliances or both.