4GB SD Card

SD cards or secure digital cards are constant companions to all kinds of cameras, may it be a pink digital camera, kids digital camera and mini digital camera; as well as electronic devices which have storage capability. SD 4 GB cards are non volatile memory cards developed by SanDisk, Toshiba and Panasonic for use in portable devices. Standard cards can store up to 4GB but SDHC or secure digital high capacity cards can store up to 32GB.

The SD was conceptualized in august of 1999. It was designed to compete with Sony’s memory stick format. The signature SD logo was developed for another use, the Super Density Disc. The SD memory card is a highly sophisticated memory device which is about the size of a postage stamp. There are many types of SD cards available in the market for use.

There are three basic types of SD cards. These types have normal SD card dimensions and are very handy and compatible with most devices. The advent of technology, wherein more devices are becoming smaller brought about the need for smaller SD cards.

• 4 GB SD card. This is the memory card of the regular size. This has various storage capacities, ranging from 2GB to 16GB. 
• 4 GB MiniSD cards. These are 37% smaller than the regular sized cards. These are compatible with smaller devices. They function exactly like normal cards. They have the same storage and speed of the SD card. These are sometimes used with adapters for transferring digital data to any SD enabled device.
• 4 GB MicroSD cards. These are even much smaller than MiniSD cards. The mobile industry is the main reason why these cards were developed. These are used for mobile phones. It is one fourth the standard size of an SD card. 

Both the MiniSD and the MicroSD cards are backwards compatible. They can be used in place of the standard card as long as there is an adapter. MicroSD, on the other hand, also support SDIO mode unlike the other two. SD is less open than USB flash memory drives and CompactFlash. However, SD is much more open than Memory Stick. SD cards can be accessed freely using the SPI/MMC mode.

4 GB SD card memoryis a small storage device that will allow you to read and write data easily without the bulk of large storage devices. There are many brands in the market so to make purchasing a SD 4 GB card easier, follow the steps below.

• Purpose of the card. What is the card going to be used for and what device will it be on? Consult the manual of the device before making a purchase to make sure that you purchase the right size of memory.
• Establish the size you desire. A 4GB card I suitable for most devices but if you fell you need more then ask yourself what size you like.
• Make sure the computer has an SD card reader. Most new computers have card readers so this will not be too difficult. If you plan on using the SD card in your computer, it is extremely important that you be able to read and write files onto it. However, if you have an older model and if it does not have an SD card reader, you might need to purchase media card reader.

• Look for USB 2.0 SD cards. Compared to the previous USB 1.0 versions, these are able to read and write data much faster. The faster storage speed you have, the better. Generally, the higher speed cards will cost more money. This information can usually be found written on the card itself, as well as on the packaging.
• Check local stores and online merchants. Once you have considered the aforementioned points, then it is time to make a purchase. Check Best Buy or Walmart, or try online stores such as amazon.com.
• Extras. Some cards have added features that may suit your needs. There are some cards which offer password protection for accessing contents. Others have a switch on the side to secure the contents and protect them from being accidentally erased.