With the new update for S6, the update shows the screen for the USB notification and it appears you can click on any of the radio buttons to determine how you want to use the USB connection. I attempted to change from charging to transfer files but as soon as I click on it, the box disappears and I can't find where to change to setting so I can transfer files to my computer. Any ideas for me of how or where I can change the settings. I never had this problem prior to the update