How often should I do a backup?
We recommend the following:
Regular Backup - Make a backup regularly. You never know when you will need one. The AJSystems.com backup programs all include a reminder function for just this purpose.
Cycle the Backup - If you use re-recordable media (e.g., a zip disk) do not rely on one backup disk. Use a set of backup disks. For example, use three sets (labelled A, B, C). Make a backup on set A , then on set B, and then on set C. Restart again using set A, then B, etc. This way, if the media goes bad (not impossible at all), you still have the prior backup available.
Keep the Backup Safe - The backup file (or at least one copy from a set) should be kept away from the computer, preferable off site. A backup disk that is in the computer that is stolen is not very much good.