Hi
I've had a similar question for a while. In my scenario, my students submit a file, but I don't wish to add feedback to the submitted file. I wish to submit a written report (PDF) that contains my commentary on the work they've completed, and I'd prefer not to attach each PDF one at a time for each student.
For example, I have 80 students complete an assignment that requires them to submit a Microsoft Access database file. I download their submissions and review them, documenting all my notes in a grading program that's specific to that assignment. My grading program kicks out a PDF report with my summarized feedback. So, when I'm done grading I now have 80 PDFs that I'd like to ZIP and upload into Moodle as feedback files for the assignment submission. Right now, I'm uploading each of the 80 files one at a time.
I've just recently upgraded to Moodle 3.0.1.
Thanks
Joe