Traceback (most recent call last):
  File "/usr/share/checkbox/scripts/removable_storage_test", line 577, in <module>
    sys.exit(main())
  File "/usr/share/checkbox/scripts/removable_storage_test", line 500, in main
    target_file):
  File "/usr/share/checkbox/scripts/removable_storage_test", line 118, in write_file
    with open(dest, 'wb', 0) as outfile:
OSError: [Errno 30] Read-only file system: '/media/jonathan/CANON_DC/tmp3f18uo.0'