Mobile storage devices are small, handy storage units for digital cameras whose storage capacities far exceed those of memory cards and are used in mass photography and for intermediate storage of high- resolution photos.
These mobile devices consist of a microdrive or miniature hard disk with a 2.5" drive or a CD drive, the controller, a USB interface and a memory card slot. The storage capacity of mobile storage devices with miniature hard drives is well over 100 GB.
To prevent accidental overwriting of image files with the same name, the mobile storage devices create a new folder for each transfer operation.
The rapidly increasing storage capacities of memory cards, which can already be several terabytes in size, is likely to reduce the market for mobile storage to a few special applications.