The title says it all. I have searched all the forums I can find, googled it, etc, but can't find anything to work. I really, really need a drive letter on my tablet when I connect it to my Windows 7 machine - it comes up portable without a drive letter. It would make Calibre (ebook database) so much easier - now I have to "jump through hoops" (Dropbox, transferring manually, etc) to get books on the tablet and then delete them after reading, because Calibre doesn't recognize anything without a drive letter. Otherwise everything is great on the tablet - of course making it work with home groups would be nice, but so far no joy on that either. Any help would be most appreciated!