FTP activity, multiple files?

Does FTP upload activity handle multiple files? Activity properties seem to suggest so as there is “UploadedFILES” which points to support for multiple file uploads… However simple path with wildcards “c:/directory/xmyfile.x” (x = wildcard/star) local path does not seem to work… simple single file “c:/directory/2myfile.txt” works ok.
(in this case 2017.1 uipath is used, update is not possible at this time)