Usually the file is created by a program, however I did a test going to the spooler directory and create a files named test with the following command.
When I do a file list in my spooler directory, I get the following
information
#ls -l |pg
-rw-rw-rw- 1 user1 ugroups 831690 Apr 03 12:52 K6A80403125051.prn :res 2330479869879093344 ext...