unknown extra drive letter exist within hardware configuration of Windows 10 laptop

Hello and Good Afternoon Everyone,

          Upon visual inspection of my hardware configuration, I did notice an extra drive letter identified as ESP (Z:) on my Windows 10 Acer laptop.  I never remember creating a partition on my hard drive.  Also, there are not any external USB storage devices hooked up either.  When I click on this unknown drive letter, I get a message indicating that I do not have permission to access this drive.  Please click Continue to have permanent access to it.   The size capacity of this unknown drive is 296MB with 270MB free.  

           In closing, this is certainly a mystery to me because of the unknown origins of this drive letter.  Any suggestions for resolving this concern will be appreciated.  

          Thank you

          George
GMartinAsked:
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Joe Winograd, Fellow&MVEConnect With a Mentor DeveloperCommented:
Hi George,

ESP is the EFI System Partition. Here's an interesting thread discussing it about an Acer Iconia with W10:
http://www.tomshardware.com/answers/id-2797014/delete-efi-system-partition.html

I agree with rindi's advice of simply removing the drive letter. If you don't know how to do that, this EE article explains it:
Running Out of Drive Letters?

You may skip over the intro — I was just having a little fun. :)  Regards, Joe
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rindiConnect With a Mentor Commented:
This could be the boot partition of Windows. That partition shouldn't have a drive-letter assigend, so just remove the letter.

If necessary to get a better understanding, post a screenshot of diskmanagment.
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nobusConnect With a Mentor Commented:
you can Always use disk manager, to see on what drive the letter (partition) is located
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GMartinAuthor Commented:
Hello and Good Afternoon Everyone,

          Thank you for your shared thoughts and links.  The information provided certainly does make sense and answers my question.

           Have a great rest of the day everyone and thank you so much once again for your feedback.

           George
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Joe Winograd, Fellow&MVEDeveloperCommented:
You're welcome, George. You have a great day, too! Cheers, Joe
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