Windows 10: "Disk has been surprised removed"

Hi, I am randomly getting these warnings in event viewer. I am not sure why this is happening but this has been happening for a while now and it seems to happen every few hours.
I only have 3 internal drives (2 HDDs & 1 SSD) and 5 partitions total (screenshot of disk manager) but the warnings often get up to disk 12 (see screenshot below) so it doesn't even make sense. I also don't have any external drives or flash drives connected to my PC.
So... should I be worried or just ignore it?
Here are some screenshots of the event viewer logs:












:)

 

Can't safely remove external disk

In reference to the steps of your suggestions:

• The issue is specific to the particular disk and it started after I've used the disk to save the System image backup (created with the Control Panel > File History tool).
• I didn't disable any windows Service. I'm just wondering if there is any to disable.
• Safe boot with networking, or clean boot doesn't resolve the issue.

Thank you.

 

"Disk has been surprised removed"

That's weird *Huh
I did not try to reset SMART data and haven't updated BIOS since I first built the PC.
All of my important files are in the cloud. I mainly use this computer to game so there shouldn't be much to back up.
I ran chkdsk yesterday when I was trying to figure out what's wrong. Everything came up fine.
HDTune says the same, unless I'm reading it wrong

 

Remove account

I suggest you backup your personalized files first before removing the account.
To delete an account, follow these steps:

1. Press WIN + X keys and click Command Prompt (Admin) from the menu.
2. Type the following command and press Enter. Replace test with the name of your sister's account. Code: