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you will want to copy the library from your laptop (located in HD/Users/Username/Music/iTunes) to the SD card then follow this 🙂
 
Thanks. That was helpful. However, I have another problem now. I deleted everything on the flash disk to redo it as I messed up and it is teling me there is no memory left?? How do I fix this?

After deleting everything, before ejecting the Disk, go to Finder, and click on the Finder menu near the top left, and then click on Empty Trash. Your space should free up.
 
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