
In Windows 10, thumbnail cache files are stored under C:\Users\UserName \AppData\Local\Microsoft\Windows\Explorer. These thumbnail cache files help Windows display thumbnails instantly without delay. In other words, whenever you open a folder containing videos, documents, and pictures in thumbnail supported view, Windows uses thumbnails saved in the thumbnail cache instead of newly generating them.


Windows 10 generates and keeps a copy of thumbnails for all documents, videos, and images on your PC so they can be displayed without any delay when you open a folder with one of the thumbnails supported view. Thumbnail cache is nothing but a copy of all of your documents, pictures, and video thumbnails stored in a file.
