How many project's backups to keep
The following reasons affect the number of backups you'll want to keep:
- Importance of project's files. If the files seem to be not so valuable, you can keep the last backup only. If the files are critical, try to keep at least two backups for the case when both the original files and the last backup are broken.
- Size of a backup. If a backup of project's files takes too much space, possibly you'll not find enough space to keep as many backups as you want. In this case you may consider extending your storage device(s) capacity.
- Necessity to keep intermediate states of files. There are cases when you'll want to keep all the backups. E.g. if you're a programmer, don't remove backups of your program at all. Possibly you'll need to restore the very first version.
The ABE has two methods of maintaining backup files: Placing files being backed up to a single backup file and Creating a new file for every backup. If you don't need to keep more than the last copy, choose the first method. Otherwise you have to choose the second one.
As for the most critical backups, consider the possibility to make several copies of the backup on other devices than the ones selected as a Storage Folder. Exporting a backup, the ABE allows you to place several copies of the backup to one folder. It's useful when you have to use an unreliable media (like floppy disks).