Storage Differences SDHC cards hold more data than SD cards. Both types of cards vary in capacity from model to model, but regular SD cards max out at 2GB, while SDHC cards come in sizes between 4GB and 32GB. A 2GB card can hold about 30 minutes of HD video recorded at 9 megabits per second or around 770 10-megapixel photos.

A 4GB card can store twice as much, an 8GB card four times as much, and so on. Compatibility Differences All electronics that use SD cards -- called 'host devices' -- are backward compatible with older versions of SD but not forward compatible.

Elementi Di Economia Politico Palmeiro Pdf Merge. Download Free Free Bmp To Dicom Converter Software. For example, a camera without SDHC support can only use a regular SD card, whereas a model that supports SDHC cards can use both SDHC and regular SD cards. Check a device's manual to find which cards it supports. Even if a device supports SDHC, you might save money by buying a regular SD card for devices that don't use much data, such as basic cell phones or feature phones. Visual Differences You can't tell SD and SDHC memory cards apart or calculate a card's storage capacity based on physical size. Both types of cards come in three sizes: microSD, miniSD and the original full size. To identify a card's type, read its label or packaging and look for the 'HC' mark. Most devices and card readers only support a single card size, unless you use an adapter, so check a device's slot size before buying a card.

Speed Differences Most SDHC cards run at the same speeds as SD cards. Each card has a speed class -- up to 10 -- that indicates its minimum sustained speed in megabytes per second. Some SDHC cards -- but no regular SD cards -- are branded as Ultra High Speed. UHS speed classes, marked with a 'U' symbol, indicate one-tenth of the card's speed: An SDHC UHS class 3 card runs at 30 MBps. You can use an SDHC UHS card in a device that doesn't support UHS, but it will run at a slower, non-UHS speed. SDXC Differences Just as SDHC cards offer a higher capacity than SD cards, Secure Digital Extended Capacity cards boost the limit even higher to a theoretical limit of 2TB.

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