Memory adapters are compatible with only certain types of Flash memory. It is important to consider what forms of Flash memory will integrate with your specific adapter.
Flash Form Factor
CompactFlash, Memory Stick, MMC, Secure Digital (SD), SmartMedia (SMC), XD-Picture, Microdrive, Memory Stick Pro, Memory Stick Duo, Memory Stick Duo Pro, Mini SD, RS-MMC
Adapter type refers to the type of conversion or adaptor that is used to connect to different types of memory.
The host interface is what is used by a memory adapter to connect to a computer or any other external device .