Regex in File collector activity

Hi ,

I would like to match a string from a list of files present in SFTP and pick only those files containing my string. For example

I want to pick 'File SMS Extract.csv' or 'File Voice Extract.csv' from SFTP and not 'File Email Extract.csv' from FTP.

I have tried using filters like File [SMS|Voice] Extract.csv , File (SMS|Voice)* Extract.csv. None have worked. Can you please help

Regards,

Priyanka