If you ever need to combine two identically-named folders together, but they contain a mix of old, new, and duplicate files, it's likely you will want to be selective in how they are merged together.

On the right-hand side, open the Do not allow Folder Options to be opened settings. When a new window is opened, select Enabled, and save it. Folder Options window is disabled now. To enable it again, ...

Windows is a complex piece of software with a long history, and it is no secret that even the latest versions still have massive chunks of legacy code and features that very few people need or use.