[whpalmer4]

Do you perhaps mean the backup files? You would be the most productive person in the world if you managed to generate an archive of completed tasks that occupied a handful of GB!

If there is a good reason for you to keep the old daily backups, you probably already know about it and don't need our advice. For most people, being able to look back in the Archive file and see the completed projects and actions is probably sufficient, and the ability to see the entire database as it appeared on some arbitrary date is overkill. If you are using Time Machine/Time Capsule for your backups, you could pull old copies subject to it's thinning policy, too.

To look at one of the backup files, just double-click it in the Finder and OF will open it. It will look very much like a regular OF window, and you can copy/paste or drag/drop items back to the active database if something needs resurrection.