Additional info
I got it going this morning and it works really well
Superfast actually
I started with Jerry's code from community.microfocus.com/.../10363.aspx
And I re-wrote it to suit my style e.g. I use MOVE instead of SET - MOVE is faster I think
And I used Chris's input and I also read KarlRainer's comments and made my own version from those 3 inputs
I delete files, not copy them, at the moment
It will delete 121 small files, one at a time, in way less than one second
I read the pre-determined folder and then decide whether to issue a DELETE or not based on the actual filename's prefix
It doesn't put the deleted files in the Recycle Bin yet (and I do want that feature) so I will add a step to COPY into there just before the DELETE
I didn't code the CBL_DIR_SCAN_END step and it doesn't matter in my case because I'm only doing one scan
Thanks for the help with this