Hover a drag over a folder to open it

Hold a drag over a folder and it opens so you can drop deeper. Escape takes you back.

How to do it

1. Start dragging files.
2. Hold them over a folder, in any view or in the sidebar.
3. After a moment the folder opens so you can drop deeper.
4. Press Escape, or drag out of the window, to go back to where you started. The delay follows System Settings ▸ Accessibility ▸ Pointer Control ▸ Spring-loading.

More detail in the guide: File operations