Hi, it appears you've asked an incomplete question. However, I shared a general overview of the cameras mentioned.
Explanation:
MiniDV: The MiniDV camera falls under the category of Camcorder. It is classified under camcorders because camcorder devices consist of a video camera and a videocassette recorder.
DSLR: DSLR cameras are classified under professional video cameras.
HDD (Hard Disk Drive), Flash: are generally classified as storage devices.
