1) Connect the iPod to your windows machine. Close the autostarted itunes by hitting the X in upper right hand corner of itunes.
2) Go to Computer or Windows explorer , click on Organize and select Folder and Search Options as shown below.

In Folder options Window select View tab and Select the Option Show Hidden files and folders in Hidden files and folders option.
3) Navigate to your ipod in Computer or Windows Explorer.
4) Navigate to Music folder in your ipod .
Full path is YOURIPODNAME (F:)\iPod_Control\Music
5) Select all the music folders and drag and drop them into a folder on your hard drive, or directly into iTunes.
And you’re done! The music folder structure in ipod is strange, but once you move your files into iTunes you can set it to automatically organize your folder by artist and album to clean that up. To do this, in iTunes Edit menu, choose Preferences and in the Advanced tab, check “Keep iTunes Music Folder organized.”
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