External hard disk gives error "this disk is write protected" only when I insert to the domain controller

I have new external hard disk in my domain controller when I try copy file to the external hard disk it says " this disk is write protected". But if remove the external hard disk and insert it to other computers like laptop other than the domain controller it works perfectly fine. The only issue is when I insert it to the domain controller that is when I can't copy file to the disk and it gives me this error. If I go the disk part and see "currently read only state: no"

Please can anyone help because I want to take backup using the external hard disk and I think the issue is the domain controller, may be there is something locking the hard disk in the domain controller, but I don't know what that is or how to fix. Also I'm using windows server 2012 as my domain controller.