Sounds like you're just manually copying all of the files in your library over by simply dragging them to the folder you want them to go to on your iTouch device. You could manually just copy the folders over in file explorer. But if your folders are spread all over, this could be a pain.
To do this with MB and Android, do the following...
1) Setup your library in MB.
2) Plug in your Android device and make sure to unlock it so you can actually access it.
3) Go to the folder you want on your Android device in file explorer.
4) In MB, click Ctrl + A to select all songs
5) Left-click and hold and drag the selected songs over to the folder on your Android device.