You can define placeholders, file name masks, and exclusion masks for the file name in the sender file/FTP adapter. This allows you to include multiple files or exclude particular files in the selection.
These entries are processed in addition to the information specified above.
In this example, you want to process all files that have the extension '.txt', but want to exclude all files that begin with the letter 'a'.
To do this, enter *.txt for File Name, and a* for Exclusion Mask.