Working with backup sets : Cloud (Salesforce.com) backup sets (Windows) : Restoring a Salesforce.com backup set at the table level : Specifying restore options
 
Specifying restore options
On the Select Restore Options page, make the required selections, and then click Next.
Examples:
Restore Schemas – If you select this option, the backed up schema(s) will be used to clear the tables and then rebuild them in the Salesforce.com database. This option is useful if the structure of any tables have changed since the backup session you are restoring.
Use Bulk API – This option minimizes the number of API call counts made by the restore process and is selected by default. When files are uploaded via Bulk API, a file size limit of 10 MB is enforced by Salesforce.com.
NOTE:  Ensure that this check box is cleared if the data to be restored contains files that are larger than 10 MB.
Save temporary database file in local storage for resume – To make the restore process resumable in the event that it is stopped during the uploading stage, select this option. For more information, see “Resuming a Salesforce.com data restore process”.
For more information on this dialog box, see the F1 help.
F1 Help: "Select restore options (SQL / Microsoft Exchange / Oracle / Salesforce.com)"