Any disk, device, cartridge, or system that has the capability of storing digital data. The majority of computer forensic examinations are performed on hard disk drives and removable storage media; however, any of the various alternative storage mediums are also subject to analysis. These include thumb drives, optical disks (CD/DVD variants), flash memory modules, solid state devices, and magnetic tapes. Additionally, data can be retrieved from several consumer devices such as digital cameras, mobile phones, MP3 players, DVR's, PDA’s, GPS units, and gaming consoles. New storage devices and media are constantly being developed. A general rule of thumb is, if a computer can read from, store to, or interact with an object then forensic analysis is possible.