NT Disk Viewer is a free tool for the treatment of hard disks, because it allows you to visualize (either in hexadecimal format or in ASCII) each of the physical sectors that compose the hard disk.
Thus, in a very visual way, you can see how each of the sectors is and check its status. The information on the NT Disk Viewer sectors allows you to copy and export them to files. It supports working on both FAT and NTFS file systems.
A very useful tool for technical specialists who sometimes need to physically access each sector.
You can free download NT Disk Viewer 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.