When an Android device is plugged in to a PC (through USB?), is the internal file system mapped to a drive letter on the PC? So that one can copy files to and from the Android u
Using Eclipse you can push and pull files to the emulator using the DDMS perspective. Doing similar on a real device, iirc will require root access to the device, at least to get to the 'sensitive' areas.
The SDK tools will also provide a way of push and pull via the command line.