How to Select an SD Card – What Are The Differences? – Ask a Tech #32

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SD Cards are a popular form of saving data in today’s portable devices. Although two cards can physically look the same, there can be some major differences between them in speed, performance and price. This video attempts to examine and explain these differences in a simple way.

An SD card contains Nonvolatile memory used to store information in lots of electronic products such as mobile phones, digital cameras, tablets, video camera and GPS devices.

SD – is a acronym for “Secure Digital”
the SD term is a product standard that was developed by the SD Association 1999-2000.

A SD card contains nonvolatile memory that is a technology tot can store and recall information from the device even when not powered on.

Four card families are currently available:
Original Standard-Capacity (SDSC) – Up to 2GB
High-Capacity (SDHC) **** – over 2GB-32GB
Extended-Capacity (SDXC) **** – over 32GB-2TB
Extended-Capacity with input/output (SDIO), which combines input/output functions and data storage. (these are only fully functional in host devices designed to support their input-output functions)

Three form factors sizes are currently available:
original size ****
mini size
micro size ****

**** As of this video the most popular formats are full and micro-size SDHC and SDXC formats.

Host devices that comply with newer versions of the specification provide backward compatibility and accept older SD cards.

Speed class rating:
The SD Association defines standard speed classes indicating minimum performance to record video. Both read and write speeds must exceed the specified value.

This video will help to find the Right SD Memory Card.

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