The Integrity Monitor is a great tool to ensure that everything is cool. It is usually run at night on a scheduler program. It has two modes, automatic and manual. In automatic mode, it will repair and compact all data files and make a 3 teir back up of all data files.
Backup files area kept in the same location with file extension bak1, bak2 and bak3. If also compares various data for integrity and allows you to trigger an e-mail alert if necessary.
For example, If youre A/R account in the G/L does not match your aging report, it will tell you and print the difference. There are over 20 user configurable options that support the e-mail alert (or print alert).