import os
import commands

file_list = commands.getoutput('find . -name "*.mp3"').split('\n')

for file in file_list:
    path = os.path.dirname(file)
    commands.getoutput('mkdir -p /Volumes/USBDRIVE/%s' % path)
    commands.getoutput('cp %s /Volumes/USBDRIVE/%s' % (file, file))