Add pictures in folders with Regular Expression Match

I'm trying to add folder incl subfolders with lots of pictures starting with IMG by using the Regular Expression.
So, Mask would be *.j* and include all sub folders.
Then I added ^IMG.*\.(jpg|jpeg)$ in the regular expression field but it still gives me all jpegs in the folders, also the ones which start with e.g. the year.

How can I do this, that I only add pictures (jpeg/jpg) in folders where the filename starts with IMG?

Thanks for your information

Reply to #1:

Hi Auntie,

Just leave the "Filename mask" field blank and use the regular expression mask, that should do it.

Best,
DF

Thanks, Delta Foxtrot
The mask needs to be completely blank. I did not try that - instead I tried versions of the regular expressions.
Have a nice weekend!