I made a full backup last week to an external portable hard drive connected via USB. This morning I tried to backup changes since last backup and I get the following message, "Backup cannot continue because the backup location is no longer available. Make sure the device is connected and you have read/write permissions for the backup folders on the device." I can see the external hard drive using My Computer, but to get to view the folders I have to grant permissions. I am thinking my problem is all the permissions. Is there a way to change my PC and my external hard drive so anyone can add/delete anything - in other words permissions for all?