Media player

how can I reset the username and password for the media player in my world drive 1TB 

I guess Ihave forgotten it , and I can’t log in to it  and set it up .

is there anyway of resetting the whole thing back to default ? 

I have tried the reset and all that does is the log in admin and network settings . 

I’m in the process of coping all my files off the drive now , and going to muck with it some more . and try to reset everything . , oh boy going to take a while to copy if all off , and then all back on when done .