A memory chip is similar to a small floppy disk. This type of chip primarily stores information, access control, or a value that can be "spent".
These are small memory modules that can be inserted into the camera to hold images. When the card is full it can be removed and another card inserted. The memory on these cards is non-volatile-m that is, they don't lose their images when they are removed from the camera. The image can be later downloaded from the card, and when the images are erased from the card it is ready to be reused. These cards are good for a lot of reuses- one manufacturer just warranted their cards for a minimum of 1,000,000 images.
Most digital cameras use removable memory cards to store images. They are essentially "digital film" and the data stored on the cards can be transferred and erased. The cards are available in a range of storage capacities, measured in megabytes. There are various formats including CompactFlash, Memory Stick, SecureDigital, SmartMedia, and xD Picture Cards.
Memory cards can be used to provide additional memory for your phone. The different types are as follows
Removable chips using 'flash memory' on which a digital camera stores its image files. Also known as flash cards. Where the name CompactFlash originated.
A computer card that can be inserted into the back of a PDA to provide more memory to store information on. A memory card would often be used to store bigger programs and extra functions.
A read/write or reprogrammable tag in credit card size
Memory sub-system in the PC card (PCMCIA) or other form factors used for memory capacity expansion.
Memory cards provide extra storage for images. Their size ranges from 4MB to 128 MB, with a 64MB card holding about 106 photos.