"Au Backup" software is a system of automatic backup files archiving. The unique feature of this program, differentiating it from analogs is that "Au Backup" automatically saves all versions of files in the archive, even after a source file was deleted. This feature allows not only restore any lost file, but continue using it since its any last saved change. The program receives tasks from users for processing separate files, and whole folders. If processing folders, it's possible to indicate filename (documents) wildcards for including to the task, and excluding from it. Tasks are fulfilled according to the user's indicated schedule, at the same time, built-in timer is used (Windows task scheduler is not needed for this program to work). The program works correctly with file access rights, and guarantees the necessary security of files and additional information, being kept and processed by the program. The program does not request administrator's or archive's operator's rights for processing user's private files, if this task is assigned by the user himself.