2012年8月10日星期五

USB Flash Drives Revolutionise Portable Storage But Pose Security Risks



USB Flash Drives SD Memory Card is one of the most popular devices on the market today for digital storage of files and information. This card can be utilized with many different applications and has the ability to read and write your information at multiple megabytes per seconds.


It also comes with the option of a protection lock so that you can make your SD Memory Card a read only type of device so that no changes can be made to your information or can’t be deleted accidentally.These are electronic devices that play the same role as the hard disks and that are used for storing and transferring digital files data. They are made of different storage capacity that allows you to purchase one that store the information that you have. You also need to consider the transferring speed for the particular memory card that you may need to buy. They come in small designs that make them portable and reliable unlike the hard disk that is big to be carried around with.

Memory cards are mostly used in electronic devices that may include mobile phones, digital cameras, mp3 players, video game consoles and laptop computers. Memory cards can also retain the data that you have saved in them without power. They are non-volatile where by they do not loose any information that is saved in them.

Memory cards have taken different formats before the end product that we have today. First were the PC commercial cards that were produced in the 1990s that are now used in the industrial applications and in the connections of I/O devices like modems. During the same period of 1990s, another format of the PC cards arrived. The only difference was that these cards were smaller compared to their original copy. These formats included the Compact Flash, Smart Media and the Miniature Card. This saw the Smart Card that was used for the digital camera stay in the market till the year 2001 as it sold for 50% total sales that were required in the markets.
The mobile phones and PDAs have also had their memory cards replaced by the microSD. The microSD have also got opportunities to sell its products because all Sony products that have been using the Memory Stick alone and the Olympus that has been using the XDCard are coming up with extra SD Card slot. The Smart Card was replaced by the SD/MMC. Other formats like the Memory Stick variants and the Compact Flash landed in the market and brought great competition to the SD/MMC format.
What you need to look for before you decide on the type of card to purchase is the memory capacity because they do vary, the speed with which the card can store a data and the prices indicated. You also need to ensure that the card you are buying will be supported by your device.

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