Documented at <https://wiki.ubuntu.com/KarmicKoala/ReleaseNotes#Wubi%20using%20persistent%20storage%20on%20a%20USB%20disk>:
Users who wish to run Wubi from a USB disk that has persistent storage enabled will need to run it with the {{{--force-wubi}}} option from the Windows command line. (Bug:461566)
Documented at <https:/ /wiki.ubuntu. com/KarmicKoala /ReleaseNotes# Wubi%20using% 20persistent% 20storage% 20on%20a% 20USB%20disk>:
Users who wish to run Wubi from a USB disk that has persistent storage enabled will need to run it with the {{{--force-wubi}}} option from the Windows command line. (Bug:461566)