If you have filled your iPad or iPhone with photos and videos and want to transfer them to a computer without syncing through iTunes on a computer it is quiet easy.
In Windows , if your iPad or iPhone does not appear when you plug it in then go to your Control Panel , Autoplay , find your device , then change the selection.
On a Mac , iPhoto should open but if you do not have iPhoto . open up Image Capture from the Applications menu
More information can be found here