SD cards are becoming increasingly important tools for transferring files between devices. They are used to enlarge the digital memory of devices such as a digital cameras. Users are sometimes required to remove the SD card from the device and insert it into an SD card reader. Some readers are found directly in a computer or laptop. If not, an SD card reader may need to be purchased. For any reader to work, a driver will have to be installed on your computer. Many of these drivers are available online. There are two main places you can look for drivers for SD card readers. The first is the SD card company website. Manufacturers will allow downloads of drivers which accompany their products. If you are unable to download from a company, such as SanDisk, then try sites like http://www.download.cnet.com.