Modifying assignment details such as instructions, due dates, or attached resources.
Hi, Natalina! I am John, Independent Advisor here to work with you on this issue.
When the assignment is set to “Students edit their own copy” which make they don’t need to upload the documents, when they edit the document, it will auto create their own copy document and store in SharePoint.
Therefore, please confirm the two paths:
Open in SharePoint> Site contents> Student Work> Submitted files folder> student name folder> assignment name folder
Open in SharePoint> Site contents> Student Work> Working files folder> student name folder> assignment name folder
Hope it helps.
Best Regards
Disclaimer:
This is a peer-to-peer support forum. I'm Non-Microsoft Staff, I don't work for Microsoft. Mostly everyone here are users helping other users.