Hi Hasan. I'm Greg, an installation specialist and 8 year Windows MVP, here to help you.
First of all try plugging the drive into another PC, as this PC may be suffering from problems caused by Windows Updates problems lately. If it's read then immediately back up all files to the desktop.
If not then see if you see the files and copy them out from the Command Line including the bootable Windows 10 Recovery or installation Media using this method:
http://answers.microsoft.com/en-us/windows/wiki...
If it also reads RAW there see the fixes here:
https://html5.litten.com/updated-how-to-fix-ext...
https://www.tenforums.com/drivers-hardware/2530...
As you'll learn from the above links, this can mean the partition table has gone bad, so the options are to try to repair it using one of the tools or methods in the links above (we used free Partition Wizard Partition Recovery Wizard thousands of times in Windows 7 but it is no longer free) , or copy out the data in which case you can save time by just reformatting the hard drive.
I would also test the hard drive with Seatools bootable long test to know it's condition for sure:
http://blog.nowherelan.com/2013/04/04/boot-seat...
If the drive works fine in another PC, then on the problem PC check which Updates were installed right before the problem began, and uninstall them from Settings > Update & Security > Windows Update > Installed Update History.
You can also try to roll back using System Restore to a point before this began:
http://home.bt.com/tech-gadgets/computing/how-t...
Then if the Update installs and causes the same problem again uninstall or roll it back again, then immediately hide it using the Hide Updates tool from Method Two here:
https://www.askvg.com/fixing-windows-10-automat...
Try also uninstalling the External Disk driver and USB drivers in Device manager, then restart PC to reinstall them. To do the restart, first program the power button to shut down at Settings > System > Power & Sleep > Additional Power Settings > Choose what Power buttons do.
I hope this helps. Feel free to ask back any questions and let us know how it goes. I will keep working with you until it's resolved.