I have 2 computers running Windows 7, my home pc and a HTPC I have built. Both are connect to my homegroup. Both are set to workgroup. Both have the advance sharing features set with no password sharing. Attached to the HTPC via usb is an external 2TB drive with media on it. I want to access that drive and all the folders from the home pc over the wifi network. On my home pc I can see the folders that are shared on the HTPC. When I click on one I get an error saying I do not have permission to access the file. All the folders and the external drive are set to be shared on the home network and read/write by Everyone. What am I doing wrong?