File recovery software is available to rescue lost damaged or deleted files from a variety of different hardware and devices. These include your personal computer’s internal hard drive, camera memory cards and popular USB flash drives. Another somewhat obsolete file storage system is the original floppy disk. These disks which were made primarily in 5 ¼ and 3 ½ inch sizes used a rotating thin magnetic platter similar to the magnetic tape used in a cassette to hold the embedded file information. Programs to recover lost or damaged files on these disks are able to recognize the file directory structure and copy from that disk information that had been marked as deleted.