Download ScanFilesByDate 220.127.116.11 (includes a separate executable to only scan by Create Date)
This handy little tool I hobbled together will let you list all files in a folder/fileshare to see what files exist, depending on the creation date and modified date.
Currently, it only runs as a single-thread. So you may want to launch multiple copies for multiple folders. It runs about as fast as DIR and outputs the data to a CSV file. Additionally, it does go into subfolders as well as far as required.