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Windows 10 HDD as an external drive by usb - Unallocated Space

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#1 viciousemu


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Posted 10 November 2017 - 09:51 AM

This is one I have come across a few times and never did find a solution. When the hard drive that contains the operating system is removed from a Windows 10 machine and placed in a caddy or similar to be attached to a different computer (running Window 7), The drive will not show up in my computer. When accessing Storage in Computer Management the Windows 10 drive (now an external drive connected by USB) shows as unallocated space and no drive letter can be assigned. The only option is to Initialise the disk but then the data would be lost (without some serious time spent on recovery). My guess is that this is to do with the 'GPT' rather than MBR partitions that was originally the case with Windows Drives... This doesnt however explain why it wont mount in Linux either or Mac OS (even when using Fuse software etc). I did try changing the settings for the drive so that Fast Boot/Fast shutdown wasnt enabled beforte I removed it, hoping this would enable it to mount but no joy. Whilst I have tried all the major platforms this question is really about getting it to mount on a Windows 7 machione

Does anyone have an explanation for this or perhaps a solution?

Thanks so much in advance,


Edited by hamluis, 10 November 2017 - 11:13 AM.
Moved from Win 7 to External Hardware - Hamluis.

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#2 JohnC_21


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Posted 10 November 2017 - 10:05 AM

Another possibility is Windows 10 will encrypt the disk when using a Microsoft Account to login.



#3 britechguy


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Posted 10 November 2017 - 11:05 AM

Another possibility is Windows 10 will encrypt the disk when using a Microsoft Account to login.




And the more I've read after this article the harder it is to determine when or whether encryption would be on "by default" or not.


Personally, I despise full drive encryption with a burning passion, except in circumstances where there is data sensitive enough to justify it.  One can encrypt files or folders using third party solutions if there are some things, but very few, that a user feels must be encrypted.


When encryption itself "gets hosed" in some way things get really, really ugly.   If you don't need it, I suggest making sure it's OFF.  I have Win10 Home 64-bit and nothing in Settings turns up when searching for either "encrypt" or "bitlocker," so I think that Win10 Home does not encrypt by default.  If anyone knows otherwise, please chime in.

Brian  AKA  Bri the Tech Guy (website in my user profile) - Windows 10 Home, 64-Bit, Version 1803, Build 17134 

     . . . the presumption of innocence, while essential in the legal realm, does not mean the elimination of common sense outside it.  The willing suspension of disbelief has its limits, or should.

    ~ Ruth Marcus,  November 10, 2017, in Washington Post article, Bannon is right: It’s no coincidence The Post broke the Moore story






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