At least an 8GB stick, you won't need the full thing. Easier to get large thumbdrives then small ones these days. Answer from logicearth on reddit.com
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Reddit
reddit.com › r/windows11 › can i use a 7.79gb usb drive to create a windows 11 bootable usb?
r/Windows11 on Reddit: Can I use a 7.79GB USB drive to create a Windows 11 bootable USB?
August 19, 2024 -

Hi everyone,

I have an 8GB USB drive, but its actual usable space is only 7.79GB. I want to use it to create a bootable USB for installing Windows 11. Do you think this would be enough, or should I look for a USB with a larger capacity?

Thanks for any advice!

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Microsoft Learn
learn.microsoft.com › en-us › answers › questions › 5353981 › size-flash-drive-do-i-need-for-windows-11
Size Flash Drive Do I Need for Windows 11? - Microsoft Q&A
To create a bootable USB drive for Windows 11 installation, Microsoft recommends a USB flash drive with at least 8 GB of storage.
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Reddit
reddit.com › r/buildapc › 7.2 gb flash drive as win 11 installer?
r/buildapc on Reddit: 7.2 GB flash drive as win 11 installer?
July 21, 2023 -

I want to make a bootable USB to install win 11, on the official site it says i need 8GB USB drive, it says 8GB on my flash drive but when I format the thing, of course it says 7.2 GB, is this fine for win 11 bootable USB? or do I need to get like a 16 GB stick?

Find elsewhere
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Quora
windows11hacks.quora.com › What-is-the-minimum-size-of-a-USB-stick-for-you-to-use-it-as-a-bootable-drive
What is the minimum size of a USB stick for you to use it as a bootable drive? - Windows 11 Hacks - Quora
Answer: Usually 8GB is enough. Most of system image install additional packages via internet during installation, or install them after reboot. So system image doesn't need to contains everything.
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Reddit
reddit.com › r/techsupport › windows 11 bootable usb flash drive format to exfat, fat32 or ntfs?
r/techsupport on Reddit: Windows 11 Bootable USB Flash Drive Format to exFat, FAT32 or NTFS?
October 17, 2022 -

I am currently building my first PC in which I want to use Windows 11 Pro.

I read that I should create a Windows 11 Bootable USB Flash Drive to install Windows 11.

I use the SanDisk Ultra Flair 32GB USB Flash Drive. The Drive had SanDisk Security Software Installer and some other files saved on it.

So I thought I should delete all of it to eventually only have Windows 11 saved on the drive.

I did delete by right click and only after that I saw the Format Option.

I read that FAT32 only supports read/write up to 4GB.

Now I am unsure which File System I should format it to to make sure that it will work.

Right now it is formatted to exFAT and has 288KB of Used Space.

Thank you for your help.

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Eleven Forum
elevenforum.com › windows support forums › tutorials
Create Windows 11 Bootable USB Installation Media | Windows 11 Forum
July 27, 2021 - You must be signed in as an administrator to create a bootable Windows 11 installation USB. The USB flash drive needs to be at least 8 GB or larger in size.
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Laptop Outlet
laptopoutlet.co.uk › blog › usb-size-windows-11-installation.html
What Size USB Do You Need for Windows 11 Installation
June 24, 2025 - If you're planning to install Windows 11 using a USB stick, one of the first things to sort out is the size. Too small, and it won’t fit the installer. Too large, and it’s unnecessary.
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Reddit
reddit.com › r/buildapc › can’t make windows 11 bootable usb
r/buildapc on Reddit: Can’t make windows 11 bootable USB
April 27, 2024 -

Hey everyone,

I have just made my first PC. I am now trying to make a bootable USB but I keep getting an error saying there isn’t enough space?

It’s a brand new 32gb USB? Anyone have a solution? I never expected this to be the part that gave me any trouble 😂

Thanks!

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Reddit
reddit.com › r/windows › is there a very small windows 11/10 iso that can fit on a 16gb usb?
r/windows on Reddit: Is there a very Small Windows 11/10 iso that can fit on a 16gb usb?
February 16, 2022 -

Looking for a very small iso that can fit on a usb. All that needs to work is the browser, powershell and cmd> I did try making 1 myself except it crashes every time in a vm. Link me to a website containing a super lite iso. Preferably for windows 11 if not windows 10.

Thank You!

edit: im dumb at that i forgot to include the usb is 16gb and i need it for windows to go. i dont care how slow its gonna be i just need it to run for school lmao

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Reddit
reddit.com › r/linustechtips › recemended usb drive for windows 11 installer
r/LinusTechTips on Reddit: Recemended USB drive For Windows 11 installer
July 28, 2023 -

I currently using a sandisk cruzer force 16 GB USB 3.1 for Windows 10 install Media. But I not sure if this is fast enough or good enough for Windows 11 install Media, I do have a Silverstone ms09 m sata to USB thing that I think if I ues a WD m.2 ssd in that it might work.