SharePoint How to Prevent Folders from Moving in Document Library?

Hello DatNguyen22l,

Your "folders" are only a way of view - an option if you activate or deactivate the folder view in a sharePoint View - 

It doesnt make sense to folders in the same library, if your members have the same rights. You could add several more libraries according to your hierarchy, not only with one library.

I would realize your hierarchy with several document libraries and different groups on certain permission levels. Thats the basic thinking in SharePoint: 

1) forget folders - think with libraries, Views and Metadata

2) set up your members NOT with personal permissions but only in this way: Groups have permissions and persons will be invited in Groups (with that permissions!)

To show you, what i mean with the folder option button i send you a little video.

Hope that helps, Eva