This may be a dumb question to many, but the answer isn't apparent to me so I'm asking it. How can I differentiate what files are in the phone's memory as opposed to the files in the SD card? Am I viewing all files in both locations when I connect the phone to a PC as a disk drive? I see all the folder and their contents but I don't know the location of them. I need to move files from the phone to the SD card as I now have the warning that the phone storage space is getting low.