Is yours an ipod or a memory stick?
My first pod ended up using as just a memory stick. I presume you can use it same way on Windows as you can on a Mac. You have an option to use it just as data stick so to speak. Been ages now though.

'Go to My Computer (if you're on a PC) and go into the iPod drive, and then drag your files into the iPod folder.' But iTunes must be closed when you drag & drop items onto the pod.
Quoted from a google search.

Alternatively, check this http://www.wikihow.com/Use-an-iPod-As-a-Flash-Drive