A card reader is a device that allows you to read and transfer data from different types of memory cards to a computer or other device. These readers are compatible with cards used in cameras, mobile phones, video game consoles and other electronic devices. They offer the advantage of expanding storage capacity and facilitating the rapid transfer of files such as photos, videos and documents, allowing access to multiple formats such as SD, microSD, CompactFlash, M2, MMC, Ms, SDHC, SDXC, T-Flash, xD among others.