To transfer files between iPods, install the Syncios iPod to iPod Transfer software on your computer. Connect your iPod to your computer, and run the Syncios software. Click the My Devices tab, and select the files you want to transfer. Click Export to backup the files to your computer.
When the export process is complete, disconnect the iPod, and plug in the iPod to which you want to transfer the files. Click the My Devices tab, click the type of files you want to import in the left panel, and click the Import button. Locate and select the exported files from the first iPod to import them into this iPod. Alternatively, if both iPods use the same Apple ID, you can use Apple's iTunes or iCloud to backup and restore files between the two devices.