READ ONLY Windows Mail won’t import. I change the attribute but it still says Read Only

I am trying to import Windows Mail and Windows Live Mail from a backup hard drive location. The files are marked Read Only. I saw that the attribute must be changed from READ ONLY. I changes it, but when I check the Property again the READ ONLY attribute remains after the change. Import says successful but folders are empty. How do I get rid of READ ONLY. All my permissions are set full control.