You are always telling us to “drag & drop” files and stuff. This probably sounds stupid, but what does that mean?
Dragging and dropping is easy. It’s a procedure where you grab something (selected text, a file, a picture, or whatever) and drop it into a new location.
To drag and drop, click the item you want to drag to the new location with your left mouse button. Now, keeping that mouse button pressed down, move the item to where you want it to be. Once you’re hovering over its new home release the left mouse button and it’ll be “dropped” into place.