How do I get around an issue transferring music from Mac HD onto a 256GB flash drive??

I have a days worth of Christmas music and I want it off the Mac and onto a flash drive. Got myself a 256 GB Kingston flash drive. I got all but 3 albums transferred BUT it's telling me there are duplicate titles. I know that; I have several versions of several of the older carols and music. I want ALL the duplicates, but it won't let me transfer them.

Is there a work around for me?

Please and thank you.