In the Quick Access, the list of recently used files and folders and also list of see that most them have been done automatically displayed . this trick is about how to delete files and folders from Quick Access in Windows 10.
for this purpose :
first , click on the start and click on the File Explorer in start menu .
then go to view tab .
in top page tape , click on the Change folder and search options From options menu .
now , if you want delete files and folders history , in Privacy area , click on the clear in Frequent folders list and Recent files list .
and then click on the ok .
it should be noted , if you want delete a special item of this list , you can right click on the intended files or folder and select Remove from Quick Access .