Jhony

hello I have this problem in my avic-mrz09 and I want to copy the backup files and when copying nothing happens, the same thing happens when I try to delete any file from USER it does not delete them .... I would be very grateful for your help

hello to all I need help with an avic mrz09, the problem is that the initial stereo stays in those Japanese letters and no longer ... someone who can help me with that please ...