C:/Users > all user data from all users on the PC
or just from a single user
%userprofile%/AppData
%userprofile%/documents
%userprofile%/(everything else like pictures, videos, etc.)
C:/ProgramData > some programs saving files here, so all users can use the data
C:/Program Files > majority of programs are installed here
C:/Program Files (86x) > some programs are installed here
or just from a single user
%userprofile%/AppData
%userprofile%/documents
%userprofile%/(everything else like pictures, videos, etc.)