Disk Master - Version 2.0 Disk Master is an ideal utility for backing up application files. For each user-defined option, you can assign up to 5 different file extensions to copy, and the program is quite capable of finding, zipping (PK v 2.04 compatible), and copying to disk every document, database, and any other type of file on your hard drive. Disk Master also features the ability to span zip files across multiple disks. Since there are several freeware and shareware command-line unzipping utilities available, restoring your compressed backups is possible even if you cannot start Windows!