how to control a USB DISK?

[zyqnews at 163.net]

hello all,
  I now have a simple project. It is to test the change of use disk,
when a new usb disk is plugged into the usb socket, the program will
copy a file to the usb disk, then disabled the usb disk to be pulled
out safely. I intend to make it with python. Does someone here get any
experiences about USB disk programming, and any suggestons ?
Thanks a lot.