Purchase Order includes convenient data backup and restore functions. These are accessed through the menu items File, Data backup and File, Data restore.
As with any computer program, it is a very good idea to backup your data from time to time so that if the disk drive containing the main data folder fails, you won't lose everything. (And all drives WILL fail eventually!) Note that in the screenshot above the backup Target is on a different machine than the Source. Should the server ("\D5r3p7) fail, I will be able to restore all data to a new server easily.