Listing the missing files (in an folder PC), that are a list

[mpsampsa]

Listing the missing files (in an folder PC), that are a list
Hello.

1-I have an list of files "A".
2-I have files are in the PC in a folder "B"
3-I put the list files "A" in the search
4-The results are 80% of the list "A"
5-How I can search for the missing 20% of files that are not in the PC folder "B", but are the list "A"?

As an simple Example:
List of files : a,b,c,d,e,f
List of files in an folder (PC): a,b,c,d
Results for the list of files in the folder of the PC: a,b,c,d
Results of the missings: e,f (How I can do this step ? )

Of course the list of files is big and with versions of sub titles (a va, a vb, a vc) , what makes it difficult to compare lists "A" and "B".

Many Thanks.

[NotNull]

This is currently not possible with Everything, but with some help of external utilities this should be possible.

Can you give some realworld examples of what that list of file ("A") would look like?
Also: I'm mot entirely sure what these subtitles have to do with it. Should those be found too or contrary: excluded?

and how big is this file list? 50 names? 1000?