While today’s advancing computer technology has indeed made storage more convenient, the risk of losing data due to some technical glitches remains a problem to be solved. The most common is addressing the security of portable data storage devices—those that are used in digital cameras and video recorders, mobile phones, and other portable electronic gadgets such as PDAs, media players, and handheld computers, and laptops. This is how the idea of creating secure memory devices came to be.
Currently, there are two main types of such devices, which also have sub-types depending on the media memory and format memory. These are the secure digital (SD) memory card and the recently developed secure universal serial bus (USB). With the pace of technology developing, however, other types or variations may be out in the market soon. As of the present, the most commonly used is the SD memory card. Many also use USB but not the new type that employs the secure digital technology. Here are the types usually bought in the market.
- SD Card has the most common memory type because many current digital devices such as cameras and handheld computers provide slots for these. The first of its kind, this can only usually accommodate data up to 2 GB.
- SDHC or SD high capacity cards are not much different from their predecessors. The only advantage that these have is greater storage capacity, which is 4 GB and above. Not all digital devices are compatible with these though.
- Micro SD cards are the SD cards’ smaller versions. These have the same storage capacity as the regular SD cards, but these are tiny and slim enough to fit most mobile phones of the latest models.
- Micro SDHCs are just as big as Micro SD’s. Their storage capacity, however, is the same as that of SDHC cards. These are the latest of the SD card family, which is why many devices may not have compatible slots for these yet. To identify them from ordinary Micro SDs, you can just check the logo on the card’s face.
- Mini SD cards are slightly smaller than SD cards. These, however, are not much used nowadays. With the entry of micro SD’s in the market and with fewer devices compatible to it, these may soon be phased out.
- Secure USB’s are the freshest secure memory devices in the digital market. One model erases data in 24 hours or denies access if used on an unauthorized server. There is another one that requires fingerprint recognition before being available. Both USBs employing smart memoryto protect your data from theft or from any other access without permit.
Secure memory is now being slowly introduced into other storages such as the stick, card, device, USB, key, etc. This is meant to give your data better protection. These may have different price memory though depending on the model and storage capacity.

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