This check determines the file system of each hard drive, to ensure that the NTFS file system is being used. NTFS is a secured file system that allows you to control or restrict access to individual files or directories. For example, if you want to allow your coworkers to view your files, but not change them, you can do this by using the access control lists (ACLs) provided by NTFS.
Note
Choosing between NTFS, FAT, and FAT32
How to Restore the Default NTFS Permissions for
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