My password ultra some file cannot to access but already login.. pls help

i already login but still some file cannot to access cause need the permission. ( My Passport Ultra ) 500gb.
pls reply.

Hello,

It is possible that you need to take ownership of that file or folder.

https://technet.microsoft.com/en-us/library/cc753659(v=ws.11).aspx

thanks hamlet, i will try after . can i asking u re a IT technician?

and what re the things that cause this problem happen? virus? just wan to asking for some IT knowledge, to prevent this problem. thanks…

There are many causes - too many to speculate on without more information.