The Pocket 1541 is a emulator for the 1541 disk drive. Pocket 1541 uses a SD card to store your data, supported formats are: D64, M2I, PRG, D71, D81 and P00. The firmware is based on the open source SD2IEC firmware. The device has four buttons and a LCD screen that can be used to navigate to the required files on the SD card. Visit the web page for more information. (The page is in Italian which you can translate with the help of Google-Translate.)