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looking to install itunes on new computer. have 2 external drives with about 122000 songs, 87000 dups. probably downloaded a couple old drives 2x, have new 1.5 terra to use for itunes. about how much to do that project thanks
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That is an increbibly large music library.  There is a way to do it but it will take a very long time.  I suggest you look at either  Doug's Apps for iTunes Dupin - iTunes Duplicates Manager - v2.3.3 or  Rinse: How To Remove iTunes Duplicates - Delete Duplicates In iTunes.

There are several de-duplicating pieces of software but with that large a library it will take a long time to run.  Like a couple days.  I would not take on that project myself but I think you will have success with either of the above mentioned software.  
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