Specifications of a Secure Digital Memory Card

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Although it has been no more than 11 years since its conceptualization and a decade since it was first made known to the public, it cannot be assumed that the Secure Digital Memory Card is static and unchanging as an electronic gadget scattered in the market today. In fact, it would be a terrible mistake to do so. The memory card brought to life by Sandisk, Toshiba, and Matsu[censored] a (better known as Panasonic) has seen numerous transformations , some in physical form, others in digital ways.

By no means has the evolution of this memory card been a one-track road to progression. There have been many growing pains that have forced developers to tinker and retool the gadget to serve its target market to the best of its abilities. The Secure Digital Memory Card is about as large as a stamp used in post offices and weighs merely ounces. And yet, this tiny 24mm by 32mm by 1mm package packs a lot of punch and holds a lot of data inside. The latest models sell 1gb secure digital, 4gb secure digital, 8gb secure digital, and 32gb secure digital.

Compatibility and backward compatibility has always been a key concern brought up whenever the discussion turns to memory cards. When the Secure Digital High Capacity 2.0 (SDHC) was released in June 2006, there have been times when devices could read one but not the other, depending on the version of the device. Because of certain modifications with x rating standards, devices may understate the actual capacity of a SD memory card.

The Write-protect feature is an optional tool offered by some SD memory cards, as it gives the user the choice whether to redo the data inside or lock it altogether to prevent any unnecessary tampering on the reader by the user. However, there are other SD memory cards that do not offer this specification, and other formats such as the miniSD and microSD completely omit this offering. As a word of warning, one has to remember that two aforementioned examples are not interchangeable with the standard SD.

The copyright protection is the most identifiable feature that SD products take pride in. Media companies have gone out of their way to release catalogs of their records and videos in this format in read-only to avoid any attempts of pirating their product that could ultimately lead to a decrease in sales.

Speed cl[censored] rating is also something that users should look at when selecting a memory card, as not are all created equally. This standard is agreed upon by the SD association and it measures how fast cards can write data in a fragmented state. The cl[censored] ranges from 0 to 10 and although there is a governing body that determines this rating, it is still the manufacturers who will quote the performance of the memory card in the end. If an SD card speed cl[censored] rating is below a specific number optimal for a device, corrupted data is a possibility so it is important to first check the application's minimum before doing anything.


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