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WHAT IS FLASH MEMORY?
Flash memory is a storage device able to be used in computers and electronics. It is non-volatile memory that erases data in units called blocks. A block stored on a flash memory chip must be erased before data can be written and saved onto it. The most common type of flash memory used is NAND flash, which is able to have data written and saved onto it. Benefits of flash memory include durability, speed, compact size and the ease of use. Flash memory is usually faster and uses less power than hard disk storage, and is portable.
WHAT FLASH MEMORY DO I NEED?
The most common type of flash memory that is used is a USB Flash, also known as a thumb drive. These devices are easy to use, and are perfect for anyone wanting to transfer documents back and forth with ease.
Flash memory is available in many different types, such as SD, Compact Flash and Memory Sticks, which are all commonly used in handheld games, smartphones and digital cameras. Many laptops and desktops have built-in card readers that accept the various types of Flash memory.
WHAT ARE SPEED CLASS RATINGS?
There are 4 speed class ratings listed below:
CLASS 2 - guaranteed minimum write speed of 2MB/s or higher
CLASS 4 - a guaranteed minimum write speed of 4MB/s or higher
CLASS 6 - a guaranteed minimum write speed of 6MB/s or higher
CLASS 10 - a guaranteed minimum write speed of 10MB/s or higher
All Class 2, Class 4, Class 6 and Class 10 SDHC cards are compatible with SDHC devices.
WHAT IS SDHC?
SDHC stands for Secure Digital High Capacity devices, which are flash memory cards with a minimum capacity of 4GB of storage. SDHC cards also allow for memory cards of a capacity between 4GB and 32GB. SDHC cards are physically and electrically identical to SD cards, however SDHC cards are preformatted with the FAT32 file system. SDHC cards are also not backwards compatible with standard SD devices, so they may have an issue working in digital cameras or USB Memory Card readers manufactured before 2007.