Question

I have a mysterious "Disk F:"

May 22, 2018 7:30AM PDT

I do not know where this drive came from. I am receiving a warning that it is becoming dangerously full. When I click on it nothing appears to be on it and it says I can do a disk clean up which will clear my recycle bin and Shaker X, but does not reduce the disk space. How do I fix this problem and where did this disk come from

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Comments
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Clarification Request
(NT) what does Disk Manager show?
May 22, 2018 10:38AM PDT
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Answer
Could be a USB device
May 22, 2018 8:19AM PDT

Some USB Wifi devices keep their drivers memory space on such drives and these will show as a drive letter.

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No USB
May 22, 2018 9:53AM PDT

There are no USB devices plugged in, are you saying, even not being plugged in, it could have stored the memory on there permanently?

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did you choose "safe remove"?
May 23, 2018 6:05AM PDT

If not, I wouldn't be surprised if like Rob said, it kept in memory, which is even less surprising when running Fast Boot, which is just glorified Hibernation file.

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How do I get rid of it
May 23, 2018 8:13AM PDT

It appears to be empty

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not certain, but try this
May 23, 2018 1:11PM PDT

Plug a USB flashdrive into the same USB slot. Right clk on the drive in windows and choose safe remove. When it says OK, then unplug the USB flashdrive. Hopefully that will release it.

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Answer
I'm seeing this after the W10 update.
May 22, 2018 10:47AM PDT
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No Drives
May 23, 2018 8:12AM PDT

I added it to NoDrives but it comes back next time you boot up your computer

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You'll have to find out why that happens.
May 23, 2018 8:22AM PDT

That's not normal but I'm still working through new issues with Windows 1803.

It's a shame this is plaguing you but for now I can write that NoLowDiskSpaceChecks seems to be working.

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Answer
Drive F
May 24, 2018 3:00AM PDT

Does disk management show this drive F?

If so where is it?

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Disk Management
May 24, 2018 7:48AM PDT

It is in disk management
this is what it states:

Layout - simple
Type - Basic
NTFS
Capacity - 450 MB
Free 36 MB

There are three other NTFS drives on this computer

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Partition
May 24, 2018 8:06AM PDT

So this is a partition on the hdd and not some usb stick.

Has this partition always been there?

Perhaps it has but you never noticed it until these low space messages started popping up.

Look at the post by R.Proffitt.
There seems to be 2 areas you need to address.

I don't have any stick time with this problem so I will defer to someone in the fix-it business.

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Me? Have stick time.
May 24, 2018 8:41AM PDT

For some reason this comes up after the big update as well as a lot of those registry cleaners so I've had to look at this more often than I want to admit.

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Answer
Here's the Solution
Jul 5, 2018 8:08PM PDT

Any drive in your computer which has a drive letter assigned to it will show up under This PC. If that drive is nearly full Windows will send a popup message alert.

What happened is this: Windows 10 installed a major update recently. The update includes creating a partition or drive which contains important data and instructions that Windows would need if you have to repair or reinstall Windows. So far, so good. This partition/drive is supposed to be hidden, not visible. Unfortunately, Windows assigned this hidden partition a drive letter which, in turn, provokes Windows to keep warning you about how nearly full it is. It's OK for the partition to be nearly full, no problem. But, it should remain hidden!

To stop the repeated warning alerts you need to make the partition hidden again. The instructions for doing this are located in the link below. Be sure to follow the instructions precisely. I did this procedure and it fixed the problem on our two Windows 10 machines:
https://answers.microsoft.com/en-us/windows/forum/windows_10-files/new-partitions-may-appear-in-file-explorer-after/115d2860-542e-410f-983c-2aeb8bbd7d13?messageId=a800c6a1-406f-4229-b269-d6c0a3980cb6

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