Is there a way to make/buy a USB drive to SD card slot converter? I know they have SD to USB, but I'm trying to take pictures with a camera and have them go to a USB rather than an SD card. I need to categorize pictures on the fly, so I figured I could have a different USB for different categories and just plug the one I need in to a spot on the camera before I turn it on and have the pictures/videos go to the USB that is plugged in. I would use SD cards but USBs are cheaper and I plan on having quite a few. This makes more sense with context, but it's a looooong story. Hope someone can help.