What does CloudKey back up?
CloudKey is a software application that automatically backs up all your files from your portable media (USB drive, memory card, etc.) into a predefined cloud-based storage of your choosing. CloudKey monitors any changes on the portable media and will start backing up immediately after files are copied into the drive.
Specific files and/or folders can be excluded from being backed up to the cloud at Settings > What to Back up and choose “Selected folders”.