Size and time constraints actually follow a file name mask:
https://winscp.net/eng/docs/file_mask#size_time

In your syntax, the file name mask is implied to be *.

Use this syntax with an explicit file name mask: "somefile.txt<20N | */"

Hi,

I was wondering if there is a way of making the filemask to process a logical AND on file inclusions rather then OR.

I would like to download files that are older than 20minutes only with a specific filename.

In this case the filemask would look like this:
"<20N; somefile.txt | */ " however this would actually download somefile.txt even if the file is newer than 20minutes.
Can one have this instead " <20N && somefile.txt" It doesn't seem to work using the editor as this one only accepts one parameter per line.

Kind regards,
Octavian