With the latest versions of Qlik Sense (QS August 2021 and above), Filetime() function returns a timestamp in UTC for the date and time of the last modification of the file filename. This was not the same in previous Qlik Sense versions.
Example:
With QS May 2022 SR4, FileTime() returns UTC time 11.25.41 AM instead of 1:25 PM as last modified time
With QS February 2021 SR15, FileTime() returns last modified time