My wife and I both have Acer 500 tablets. We have different music, photos and videos on the respective exrernal SD cards. Occasionally there is a need to transfer a file or folder between the two Acers. I was thinking that "ES File Explorer" might work if we used ftp or bluetooth. Another possibility might be "WiFi File Explorer" or "WiFi File Explorer Pro". Any suggestions on the easiest way to do this would be appreciated.