The CompactFlash form factor also provides better portability than the PC Card, due to its smaller size. I slots are prevalent in many digital cameras and some handheld PC products. Type II slots are being designed into these products as well as printers, video cameras, etc. In addition, CompactFlash card manufacturers will often provide a list of supported host devices. The SmartMedia, MultiMedia, Memory Stick, and Miniature Cards are all solid-state memory cards that have different levels of market acceptance.
Every card needs specific support by the host system.
The MultiMedia Card is one-fourth the size of a CompactFlash card. Because of their size, MultiMedia Cards are primarily designed into portable phones. These products have up to 32 MB of capacity. In most cases, stored data is downloaded to a desktop or laptop PC for post-processing. The IR connection has a significant advantage of not using cable but is still slow for larger files.