You might have to install nautilus or another file manager in the debian-9 template.
I didn't have files on qubes 3.2 debian8 to debian-9. Can't remember if fresh install of 4.0 debian-9 template needs file manager installed too. To sync new programs installed in template to the appvms desktop menu, start the debian-9 template terminal, in it type qvm-sync-appmenus. -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to qubes-users@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/097d9972-a64c-4bcb-a442-260aaf98de9b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.