How to move whole folder from project view to hierarchy view

I am currently working on an FPS and there are thousands of objects In my project view and it will take lots of time to drag it into the hierarchy view. The Build and run option is not working on my PC so my only option is to drag all of the objects one by one which will take lots of time. I tried to add all of the objects in one folder and drag it into the hierarchy but it did not work. Is there any way in which you can drag a whole folder into the hierarchy view. I am currently using unity 2019.4. Please somebody respond fast.

Simply click in the first object, hold and mantain the shift key and click on the last one and when they are all selected drag to the hirerchy