Coming from an HTC Rezound (and all previous android phones), when I would connect to my PC via usb, all folders on the phone were accessible on the PC but not on the phone while connected. The hidden folder starting with a period would show up on the PC as well. Copying to either the internal storage or the sd card was quick and easy. With the S4 connected via usb the hidden folders are not visible & the folders are still accessible on the phone while connected. Copying to the sd card takes forever or pops up an error. Copying to the internal storage is fine. If I remove the sd card and mount it directly to the PC everything is fine. Is this a known issue or is there a setting that can me managed to fix this? I am thinking about pulling the card to back it up & reformat it to see if that helps but with almost 45 gb of media on it, it could take quite hours.