Quick Tips On Buying A Memory Card
By Cecilie Blaber | Submitted On August 02, 2012
Compatibility
Even if a memory card fits into a slot on your devices doesn't necessarily mean it's compatible. Every digital camera or cell phone, etc., are designed to accept specific cards. Before looking, check your devices and find out which one are compatible with each device.
Types of Memory Cards
Dozens of formats have been made but, not all of which are still available. These are some of those common formats which are presently used by consumer electronics
Secure Digital. SD and SDHC are similar in appearance however; SD carries up to 4GB of data while SDHC carries up to 32GB or more. SDHC are backwards-compatible with SD. SDHC card slots can be replaced with an SD card but the other way around is not possible.
MicroSD and MiniSD are smaller versions of SD cards. These are used for devices like cell phones and MP3 players. MicroSD cards can be used in regular SD card slots using an adapter.
Compact flash cards can carry up to 100GB. These are not as common as SD card, but they're starting to gain popularity.
Memory Card Speed
The speed determines how fast it exchanges data with you device's internal memory. Commonly, speeds include 4-6 MB/sec and 9-12 MB/sec. When capturing photos in quick succession, higher speeds are very valuable.
Class 6 (6MB/s) cares are the minimum for shooting HD video.
Class 10 (10MB/s) cards easily exceed the standard minimum needed for full HD movies.
UHS-Class 1 cards are the highest speed rating for very high-speed, high resolution digital cameras and professional quality full HD movies.
Internal Memory
Devices may have a certain amount of internal storage which is similar with RAM on computers. This storage is separate from any memory cards you've plugged in. If you need more storage for your devices that can't be handled by the internal memory, check your devices for an expansion slot.
NOR and NAND are acronyms that describe different ways memory cards write and erase data. Both have write-and-erase limit capacity: NOR flash memory were good for about 100,000 write-and-erase cycles while NAND is good up to 1 million write-and-erase cycles. After reaching the limit, you need to get a new memory card. I don't think NOR is still used today
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Care and Feeding
Mishandling of memory cards like bending or twisting, wetting, getting them dirty and wrong insertion(inserted backwards or upside down), will cause damage not only on the card, but your devices. The biggest danger though, is having your memory card getting lost. There are cases available in various configurations which offer overall protection and easy locating.
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