Specify a folder as a master list of files to search for

[Terry]

Thanks for an awesome program. It is incredibly well thought out and versatile.
One small addition I think would be useful would be to add the ability to specify a folder (or drive) as a master list of files to search for.

As an example, I have a USB memory stick with loads of different files on. I want to search my large main drives for - just - those files.
It's a bit like the option to "Search only files between different source folders". This option however, unnecessarily scans all the files on the large main drive and if you have more than two drives selected (say to large main drives and the USB drive) it will find duplicates between the two main drives as well (which may be legit back up copies).

I tried using the "File Filter" and "Add filter by file selection" but this has two problems.
A: it includes the file path and so will never find duplicates in different folders. It really wants to just extract the file name and extension.
B: you have to select each file manually, rather than clicking on a folder to automatically select all the files within it (and possibly sub-folders).

One further small request would be to add the number of folders removed, assuming the option is selected, to the results log.
Thanks