This Salesforce backup set general properties.
Client Name / Client Computer
Displays the name of the Client computer on which this backup set set is found.
Instance
Displays the name of the instance to which this backup set belongs.
Make this the Default backup set
Specifies whether the selected backup set is the default or a user-defined backup.
When you select this option, the previously designated default backup set is automatically reallocated as a user-defined backup set. To clear this option, open another backup set, and then select the check box.