Ever since I updated the firmware on my Galaxy S3 a little over a week ago using Kies, the photos from camera, downloads etc have been saved in their respective folders but won't show up in the sdcard & won't import to the computer (Win 7). Pre-update photos seem to have saved as MP4 files on sdcard, as well as remaining as JPEGs etc in their own folders & being recognised by the computer. An error message is shown when I connect the phone to Kies - & then says it's syncing, &c but it's not. I backed up the phone just before the update, but it hasn't been since because of the connection problems.

This is the first android I've had, & I've only had it for a month, so please forgive my ignorance.