Windows 8 and 8.1 Forums


UEFI/EFI Fat32 Access in Windows 8

  1. #1


    Posts : 3
    W8 x64

    UEFI/EFI Fat32 Access in Windows 8


    THE PROBLEM:
    Hello all, I've got a minor dilemma upon my hands. I regularly work with EFI partitions (Fat32 formatted as per requirements) on my usb drives (for loading Ubuntu, Win8 installs, and Win7 installs), and I cannot seem to access any of these drives in Windows 8.

    No matter how many times I format the things to Fat32 I can not even access them at all. I get the error message "You don't currently have permission to access this folder, Click Continue to permanently get access to this folder" <Clicks Continue> "You have been denied access to this folder. To gain access to this folder you will need to use the security tab" <Right-Click, Properties, search for non-existent security tab>.

    I understand that the security tab does not exist on Fat32 partitions. But how do we access these drives? The only other way I have found is through elevated command prompt run as administrator. (Which is dumb when you think about it because any virus coded for DOS can essentially access your EFI partition essential to your computer's booting into Windows, but you cannot access it to fix it?) Some days I just wonder what people were thinking when they write software. ~Sigh~

    I commonly extract ISO images straight onto Fat32 USB when they contain the /efi/boot structure, but I cannot do this without explorer access (Oh and elevated explorer doesn't help either). MS Dos only sometimes works because of the naming rules associated with it and the xcopy command, etc.

    To re-create my disaster, format any USB drive as Fat32 using Windows 8 (or plug one in which is already formatted as such) and try to access it. Then try right clicking the drive and look for said 'security' tab.



    TO SUM UP:
    I cannot read/write/access Fat32 partitions.
    It is a re-creatable issue
    According to Google and 8Forums nobody has solved this. 8f has not had this issue brought up on it before.
    If anyone is able to help out with this that would be wonderful, thank you in advance!!!



    SOLUTION:
    I'll edit this post with the solution later when/if it reveals itself, and move it to the top of the post.

      My System SpecsSystem Spec

  2. #2


    Posts : 2,191
    Windows 8.1


    So, in summary, you cannot format and then access any USB drive as FAT32 in Windows 8? Is that correct? If so, and you haven't messed around with any permissions, I would be surprised if that were the issue; however, I seem to get surprised a lot these days. Anyway, it works OK for me so here are a few basic screenshots for you review. They may not help at all but who knows? Good luck.

    Click image for larger version

    Click image for larger version

    Click image for larger version
      My System SpecsSystem Spec

  3. #3


    Posts : 3
    W8 x64


    My apologies, it seems a reload of windows fixed it, but I required a third party to load a new usb install drive
      My System SpecsSystem Spec

  4. #4


    Posts : 2,191
    Windows 8.1


    Hey, that's great news! Just for the record, I used an A-typical USB flash drive. Were any of your problems related to using one of those Toshiba Canvio or WD Passport external drives? Just curious. Anyway, glad you got it fixed! Cheers!
      My System SpecsSystem Spec

  5. #5


    Posts : 3
    W8 x64


    Generic chinese flash drives (*4) and 3 OCZ flashes also
      My System SpecsSystem Spec

  6. #6


    Posts : 2,191
    Windows 8.1


    Quote Originally Posted by Avinator9000 View Post
    Generic chinese flash drives (*4) and 3 OCZ flashes also
    Thanks for that!
      My System SpecsSystem Spec

  7. #7


    Posts : 2
    Win 10 ,8, 7


    Click image for larger version

    I followed https://superuser.com/questions/6628.../902583#902583 advice and it helped but I still have problems. See Attached Pics of my OEM disk 1.
    I can now access and read all partitions except partition 1 and 3. Partition 1, I can see in "My computer" but even after killing and elevating explorer.exe I get the error that I do not have permission. This is the most important partition to me and I need to have full access/ control.
    Partition 3 is very small and I can not assign a drive letter to it, nor see it except in Diskpart. Partition 3 is labeled "RESERVED" I need to have full access/ control.
    Partition 4 has my Win 8 OS on it and I want to clone it and the boot files to A SSD.
    Why even after assigning drive letters can I not see the drive letters in disk management ?
    Question, Can Partitions 1,2,3,5,6,7 be converted into FAT32 without loss of data via editing the partition table or some other method ?
    My ultimate goal is for drive 1 is to clone it to my SSD then reformat it.
    How do I reformat this drive to one NTFS partition ?
    Mrgcav@gmail.comClick image for larger version
      My System SpecsSystem Spec

  8. #8


    Posts : 2,690
    Windows 3.1 > Windows 10


    Question, Can Partitions 1,2,3,5,6,7 be converted into FAT32 without loss of data via editing the partition table or some other method ?
    NO

    My ultimate goal is for drive 1 is to clone it to my SSD then reformat it.
    How do I reformat this drive to one NTFS partition ?
    After you clone to SSD - and boot from SSD - you can Clean and format HDD
      My System SpecsSystem Spec

  9. #9


    Posts : 2
    Win 10 ,8, 7


    Thank you

    I figured converting the partitions to FAT32 was not possible. But EFI is FAT32 with some minor difference. I have edited partition tables previously to access other secure drives.
    I know how to clone a drive and planned to do. I still need to access partition 1, before I clone anything.
    Any suggestions on that ?
    MRGCAV@gmail.com
      My System SpecsSystem Spec

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