Q: ipod nano 1st gen error 1439

Solution may be found if you search in the "More Like This" section over in the right column.

Have you tried everything in this article?

iPod: Cannot restore or update in iTunes with error 1415, 1417, 1418, 1428, 1429, 1430, 1436, or 1439

It could be an indication or a damaged or dying hard drive.  I would recommend doing a disk diagnostic on the iPod's HD using the instructions given by turingtest2 in this older thread.  He also covers what the resulting numbers indicate.

https://discussions.apple.com/thread/3784647?start=0&tstart=0

B-rock