Windows 10: Windows 10 multiple hard drive slowdown issue

I have 4 hard drives, totally 9tb of space, and my computer thinks it's all 1 drive for some reason. It says it's only using 30% of hard disk space, but it's actually using the entirety of the master drive and causing massive slowdown. I didn't have this problem with windows 7 and can't figure out how to fix it.

:)

 

Hard drive/ OS issue

a guy suggested :

• shutdown
• unhooked HDD
• restarted
• yay !!
• reconnected HDD
• restarted
• yay !!

also , try method 3
How to Unlock Drive in Windows 10: 5 Ways to Remove a Lock

 

External drives and Windows 10 issue

Since you are having multiple issues with Windows 10, we suggest you to run a System File Checker (SFC) and Deployment Image Servicing (DISM) to look into the system for possible corruption. To do so, kindly follow the steps below:

• Press Windows key + X
• On the menu which should pop-up on the lower-left side of your screen, click
  Command Prompt (admin)
• Type the following on Command Prompt (wait for the SFC scan to finish before running DISM):
  
  sfc /scannow
  
  dism /online /restorehealth /cleanup-image
  
  

Check the result of the scans, and if it states that it was able to fix some corrupted files, simply restart your computer to apply the fix and check if the issue persists.

Regarding your external hard disk, we suggest you to update your USB Hard Disk drivers. To do so, follow the steps below:

• Press Windows key + X.
• Click Device Manager.
• Find the disk drive for your external hard disk.
• Right-click your disk drive.
• Click Update Driver Software.
• A new windows will prompt, click Search automatically for updated driver software.

Let us know how it goes.

 

Windows 10 1909 Causes Secondary Hard Drive to not be Recognized

Installing the Windows 10 1909 Update causes my secondary hard drive to not be recognized.

Steps to confirm issue:

• Secondary drive not visible in Windows Explorer
• Secondary drive not visible in device manager
• Secondary drive not visible in disk manager

Steps to replicate issue:

• Installing 1909 update

Steps to resolve issue:

• Uninstall 1909 update

Since updates can only be delayed for so long, an actual fix would be appreciated.