Spanning Backup for Salesforce backs up all objects in Salesforce (including custom objects) that include 'Id', 'SystemModstamp', and 'IsDeleted' in their item description.
There are some items which are not possible to back up:
1. Field values determined by a CalculatedFormula
2. Fields that have a Compound Address
Also, there are some items that Spanning can successfully back up, but are unable to restore back into Salesforce due to restrictions from Salesforce which do not allow their creation. Once backed up, it can be exported to your local hard drive.
If you have any additional questions, please email firstname.lastname@example.org.