Preferences: Backups
Save __ backup files: Lets you set the maximum number of backup files TimeCache creates in your user domain's Application Support folder (within the Library folder). Backup files are created automatically when TimeCache closes a data file. TimeCache appends "BU" to the end of your file's name and numbers them successively. We recommend keeping at least four backups in case you need to revert to an earlier copy of a file because of disk or file damage.

Backup Invoice files: Tells TimeCache to back up your current Invoice file (if there's one open) when it closes your data file. TimeCache uses the same maximum number for Invoice files as for data files.

In addition to these automatically created backups, we highly recommend you regularly back up your data and invoice files to separate media. This is generally good advice for all important data you wish to preserve.