how do you backup your ipod music?

I wanna download some new music but my ipod’s running out of space. I really don’t wanna delete any single song, how can i backup them to my computer? They said I can copy the songs to anywhere on pc but that didn’t work at all, when ipod was pluged in there was no music(only some pictures) shown on the computer! I know there must be one solution, anyone know how ?

First, pls make sure you use the latest iTunes version for your iPod Touch. Just open iTunes and connect your iPod to the compute. Once iTunes recognize your iPod Touch you may click “Music” in the navigation bar and select the music you want to transfer. Click the songs you ‘ve chosen and drag them onto the iPod menu in the navigation bar. Wait for a few minutes and you can see them on your ipod. Done!
If you don’t wanna use itunes or wanna find another easy way, then just google iPod Transfer to seek some useful tools