Best way to move 80,000+ files

Here is my situation.  I've been tasked with archiving off all files from a large directory structure that have not been modified in the last two years.  I ran a simple report and there are in excess of 80,000 of them.  My plan is to move them to another volume on the same server (maintaining directory structure) where they will sit for awhile prior to being archived off to disk (for easy restore purposes).  I've toyed with the idea of working some excel magic to build a batch file using individual robocopy commands which would work, but an 80,000+ line batch file seems somehow inherently wrong.  
The problem is that I don't want to copy entire directories, just certain identified files within the structure. Maybe a script which reads in paths and file names from a csv file and runs a command...    

I just know that there's a better way to do it.  I'm working under a deadline and will place this one at 500 points due to the complexity and importance of the task.  I'd make it 600, but they won't allow it.