We send full-account backups offsite nightly and retain these for 30 days, the backup runs every day at about 2- 4 AM.
You can use the steps given in the link below to restore or download a site's particular files or database you want.
To Restore Files using JetBackup 5:
https://secure.lightningbase.com/index.php/knowledgebase/77/How-to-Restore-Files-using-JetBackup-5-.html
To Restore a Database Backup using Jetbackup5:
https://secure.lightningbase.com/index.php/knowledgebase/78/How-to-Restore-a-Database-Backup-using-Jetbackup5.html
To restore a Full Account Backup using Jetbackup 5 :
https://secure.lightningbase.com/index.php/knowledgebase/75/How-to-Restore-Full-Account-Backups-using-JetBackup-5-.html
To Download a Full Account Backup using Jetbackup 5:
https://secure.lightningbase.com/index.php/knowledgebase/76/How-to-Download-a-Full-Account-Backup-using-Jetbackup-5-.html