What does win7 mean by being loaded into the following blank NTFS folder?

Generally, we assign a drive letter to the hard disk partition, such as C: drive D: drive, and then we can access the files and programs in this partition through C: drive D: drive in my computer. "Load the following blank folder" means to assign an empty folder to this partition without a drive letter, and then we can access the files and programs in this partition through this folder (you can see what is in this partition by opening this folder). Similar to mount points in unix.