https://www.youtube.com/watch?v=z5Jv0C6lu9o
In Windows 10 , Whenever you open File Explorer : it opens ( Quick Access ) – Frequent folders and Recent Folder by default

But you can easily Modify setting as per your need
Following Steps to remove Quick Access folder in Windows 10 : –
1.) At top : Go to view ( besides Home and share button )
and then Options at right side ( Change folders and Search options )
2.) Now in Folder option : Select ( THIS PC ) when open file explorer
Additional settings : Remove Recently Used folders
You can change privacy also in this ( as per your need )
– Show recent used files in Quick Access
– Show frequently used folders in Quick Access