Hi !
First, we come from this post.
I've made a .bat script for Windows to automatically generate the required folder structure to upload feedback files to students, based on the .csv "offline grading" worksheet.
Also included is a .bat script to fill this folder structure with files taken randomly from another folder. I use this to give random instructions to every student.
Both can be found in the following github repository. Hopefully this is the beggining to a set of scripts for this kind of purposes.
Best!