Can You Get 4gb Micro SD card? - HotUKDeals
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Can You Get 4gb Micro SD card?

fleetingmind Avatar
8y, 9m agoPosted 8 years, 9 months ago
Play.com have a Micro SDHC 4GB Card. What is the HC bit?

Need it for my DSTT Multimedia card for DS. They accept 4gb cards as R4's don't. Is that right?
fleetingmind Avatar
8y, 9m agoPosted 8 years, 9 months ago
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From Wikipedia:

SDHC
8GB SDHC cards
8GB SDHC cards

An extension of the SD standard, SDHC (Secure Digital High Capacity, SD 2.0), allows capacities in excess of 2 GB. SDHC cards are often formatted with the FAT32 file system, which supports partition sizes greater than 2 GB.[11] It uses the same form factor as SD, but the SD 2.0 standard in SDHC uses a different memory addressing method (sector addressing vs byte addressing), thus theoretically reaching a maximum capacity of up to 2048GB. SDHC cards only work in SDHC compatible devices, but standard SD cards work in both SD and SDHC devices. The SDHC trademark is licensed to ensure compatibility.[12]

SDHC cards have SD Speed Class Ratings defined by the SD Association. The SD Speed Class Ratings specify the following minimum sustained write speed on to empty SDHC cards:

* Class 2: 2 MB/s
* Class 4: 4 MB/s
* Class 6: 6 MB/s

As of early 2008, SDHC cards are available in capacities up to 32GB.

[edit] SD and SDHC compatibility issues

As of early 2007, the simultaneous availability of non-standard 4 GB SD and of standards-compliant 4 GB SDHC cards, and incompatibilities between SD and SDHC have caused confusion among consumers buying memory devices.

SD and SDHC cards and devices have these compatibility issues :

* Devices that do not specifically support SDHC do not recognize SDHC memory cards.
* Some manufacturers have produced 4 GB SD cards that conform to neither the SD2.0/SDHC spec nor existing SD devices.

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