How do I use a jump drive on my digital camera?

Just bought a Sony Cybershot S45 digital camera and 1gb of portible USB memory. How do I use it?

I think you can't. I've not encountered a Sony Cybershot S45 before but chances are it uses memory stick or compactflash cards. If you have a 1GB USB drive the only way to use it is to download via pc or get a OTG connector. Either ways you won't be able to stick the jumpdrive directly into the camera.