I.II.II. Special - External Drives External drives, like for example USB-Drives, can be recovered with GetDataBack just like internal drives. However - scanning the drive for your data takes much longer when performed through USB, especially when using USB1. The scan can be up to ten times longer, so while scanning a 100GB drive normally takes about 2 hours, it can be up to 20 hours through USB. If at all possible, remove the drive from its casing and attach it directly to the IDE-cable of your computer. If you are afraid that unwrapping the drive is going to void its warranty, leave everything as it is and be patient.