How to clear frequent folders and recent files history from Quick access in Windows 10
Windows 10 Quick access feature shows your frequently used folders and recently accessed files in File Explorer under Quick access view. You can clear your frequently used folders and recent files history from quick access using below steps:
In Windows File Explorer, go to View menu and click "Options" to open "Folder Options" dialog.
In "Folder Options" dialog, under Privacy section, click on "Clear" button next to "Clear File Explorer history".