How do I drag-and-drop files from my computer to a Resources folder?

Go to Resources.

Select the Resources tool from the Tool Menu of your site.

Click Add, then Upload Files.

To the right of the folder you want to drag-and-drop files, from the Add drop-down menu, select Upload Files.

This displays the upload Files page.

Drag and drop files from your computer.

Drag files from your computer and drop them in box marked "Drop files to upload".

This will display thumbnails of the files that will be uploaded.

Click Continue.

This uploads the files.

View files in Resources.

The files are now located inside the selected Resources folder.