Win Install media, FAT32 or NTFS?

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  1. RBT
    Posts : 53
    Windows 10 Home
       #1

    Win Install media, FAT32 or NTFS?


    Around the web I've seen descriptions creating Windows 10 install media (USB, mounted Drives etc) where most are formatted to FAT32. But some that said you could format the media NTFS. Is this platform specific (?) curious what difference is or other delineations.
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  2. Posts : 8,108
    windows 10
       #2

    If you download from MS media creation tool at the end it gives an option to create media thats the best option and always works
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  3. Posts : 869
    Windows 10 Professional x64 21H2
       #3

    FAT32 is recommended. UEFI boot doesn't work with NTFS so go with FAT32.
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  4. Posts : 526
    Windows 10
       #4

    Some computers boot from NTFS, some donīt. You have to try in each case.
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  5. Posts : 4,143
    Windows 3.1 to Windows 11
       #5

    Fat32 is a Requirement of UEFI Booting..
    Legacy Booting support Fat32 & NTFS
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  6. RBT
    Posts : 53
    Windows 10 Home
    Thread Starter
       #6

    Kyhi said:
    Fat32 is a Requirement of UEFI Booting..
    Legacy Booting support Fat32 & NTFS
    Thank you for the reply which is most interesting. Since UEFI is a modern paradigm I ponder reasons why UEFI picked FAT32 over NTFS (?) whereas Legacy Bios supports either. These reasons (or reason) obviously must carry more current weight than the limitations of FAT32, 4 GB max file size, 8 TB max partition size. I'm "guessing" the reason is compatibility with the widest range of platforms (both hardware and OS)?
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  7. Posts : 526
    Windows 10
       #7

    As I have understood it, FAT32 is used because it happens to satisfy the requirements established in the UEFI specification. The specification does not require specifically to use FAT32.

    The size limitations of FAT32 are 4 GB for files, 32 GB for partitions.

    In some computers, for example in this [a 5-year old Lenovo desktop], itīs possible to boot from a UFD formatted with NTFS, in "UEFI-only" boot mode [no legacy mode], and without using Rufus or disabling Secure Boot.
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  8. Posts : 4,224
    Windows 10
       #8

    You can use the excellent and free Ventoy program to build an ISO USB Flash Drive: it creates a small FAT32 partition for booting from, and allocates the rest of the UFD to NTFS or exFAT for storing ISO files. When you boot to the Ventoy drive, it reads the "big partition" and presents you with a menu of boot choices for each ISO image it finds. See @Kari and my stories at Win10.Guru about this terrific tool:
    Admin Toolkit: Create multi-OS install media with Ventoy (Kari's story)
    Bootable USB Tool Ventoy (my story)



    HTH,
    --Ed--

    PS: If you decide to give it a try, download it from Martin Brinkmann's Ghacks.net link (the developer's link is on a massively under-provisioned Chinese website, and it is difficult to impossible to grab from there). Here's that link, for your convenience:
    https://www.ghacks.net/wp-content/up...06-windows.zip
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  9. Posts : 4,143
    Windows 3.1 to Windows 11
       #9

    PS: If you decide to give it a try, download it from Martin Brinkmann's Ghacks.net link (the developer's link is on a massively under-provisioned Chinese website, and it is difficult to impossible to grab from there). Here's that link, for your convenience:
    Releases . ventoy/Ventoy . GitHub
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  10. Posts : 18,432
    Windows 11 Pro
       #10

    Anibor said:
    The size limitations of FAT32 are 4 GB for files, 32 GB for partitions.
    That would be incorrect information. The partition size maximum for FAT32 is 16TB. The drive size limit for MBR is 2TB. There is an artificial limit of 32 GB placed on FAT32 by Windows, but not a limit of FAT32 itself.

    In regards to the UEFI specification, it states that UEFI must be able to boot from FAT32. That does not prevent manufacturers from enabling their UEFI firmware from booting from NTFS - but it is not a requirement of the UEFI specification to do so.
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