Snapshot is a way to backup a SellerDeck system to include the system database and all other associated files.
You can do this two ways:
On exit select Site Snapshot
At this point you can also Compact the database.
Or from the File menu select Snapshot | Export Site
For support purposes you may need to send the snapshot to ourselves or to SellerDeck. You will be given instructions on the best way to do that if required.