The snapshot created by Data Backup is primarily intended to let you protect your data before doing something like pruning or committing a match.  Each time you backup data with that method, you overwrite the previous snapshot.

 

The Data Archive option will create a zipfile of your current data.  You can keep multiple backups on your hard drive, but should also copy them to a floppy or CD in case your hard drive crashes.  The zipfiles can also be e-mailed to anyone who needs a copy of your club's match and shooter data.  They can be unpacked with WinZip® or any other program that can open zipfiles.

 

To archive your current data, click Data File Archive on the File menu.  Then click through the wizard.