Hello,
Just bought the ZimaCube Pro from a friend after migrating everything and using it for a while a high pitched squealing noise appeared.
I find this very annoying essentially for such an expensive piece of tech 
In the link below you will find a sound bit of it with the rear fans disconnected
https://timv-2.stackstorage.com/s/sMrMfrt2mbOuhD2H
How can I resolve this?