Media Prep Utilities:
Most Digital Media (CompactFlash, SmartMedia, Memory Sticks) readers come with a utility to prep the media. These utilities are accessible from Windows Explorer, My Computer or from The Start Menu. Once these utilities are run the images that existed on the card prior to the prep are no longer retrievable.
Formatting:
When formatting a card it is recommended that you use the command line formatter in Windows unless you do not wish to recover the images. Do not format the card in the camera, as many cameras do a destructive format, and the data will not be recoverable.
Hard Disk Drives:
While you may see an option for disk drives, and PhotoMedia® Recovery will scan disk drives, the option is available to accommodate cameras that mount as drives. Because of the large amount of images on a hard disk drive and thumb nails created during the recovery it is not recommended that PhotoMedia® Recovery is run on hard disks.

Camera/MP3 Combinations:
Because of the nature of the MP3 Format, images deleted from cameras that support both formats may not be retrievable.