If you want to quickly assign many files to your students, you can follow these steps:
Move all the files that you want to group into a single folder.
Right click on the folder and choose “Assign”. This will open a dialog box where you can choose the students or groups that you want to assign the folder to.
Make sure that the option “Apply to all subfolders and files” is selected. This option is selected by default, but you can uncheck it if you want to exclude some subfolders or files from the assignment.
Click on the “Confirm” button to complete the assignment. The folder and its contents will be visible to the students that you have assigned it to.