I have a Dell Venue Pro 8 running Windows 8.1. It will not allow me to copy files via USB to it. I physically took my micro SD card out of it and transferred the eBooks from my Windows 7 SP 1 laptop to the SD card. When I reinserted my SD card into my Dell Venue Pro 8 ADE would not recognize the books on the card even though I had authorized the installation of ADE on the Dell. Where is the setting in ADE to allow it to find my books?