I can't install wd sync

Hi

i have an new iMac late 2015 and i just can’t install wd sync
i think there is a problem with my previous iMac late 2009 were the user files were transferred to the new one

on the guest account i can install and use the wd sync
can someone explain how this can

thnx

stan
from belgium

Which version of Mac OS do you run in the computer? Also, a part of your post implies the application can be installed (Contrary to the thread’s title), but it does not work in your main user account. A clarification would allow for more Users to better help you.

the latest 10.11.4
also another problem if i see on the dashboard there is 1.3 tb in use by other things, how do i acces this and see what it is?