"your bootable usb drive could not be created" issue when trying to run boot camp assistant

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Level 1

8 points

"your bootable usb drive could not be created" issue when trying to run boot camp assistant

I have downloaded the latest windows disk image from https://www.microsoft.com/en-gb/software-download/windows10ISO

I am using a new SanDisk 32GB USB drive where the windows install setup should be saving. However, I get the following error:

"Your bootable usb drive could not be created. There is not enough space available on the disk." There should be enough space as it's a new empty 32GB drive and the boot camp requirement is only for 16GB.

How do I resolve this error so that I can install Windows on my Mac?

MacBook Pro 13″, macOS 10.13

Posted on Oct 3, 2020 4:15 PM

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Answer 1

rcwhiteley Author

Level 1

8 points

Oct 4, 2020 2:06 AM in response to Loner T

What is the current version of macOS? High Sierra version 10.13.6 (17G14033)

What is the name of the W10 ISO? Win10_2004_English_x64

It is an old mac, mid 2012 macbook pro. The software is up to date.

I read that there is an issue with the more recent ISOs so I downloaded an older version and still had the same error: Win10_1809Oct_v2_English_x64

Is there an even older version of the ISO that I should try? This is the oldest one that I could find on this website https://tb.rg-adguard.net/public.php.

Is there anything else that should solve this?

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Answer 2

rcwhiteley Author

Level 1

8 points

Oct 4, 2020 11:28 AM in response to Loner T

The mounted file, called 'CCCOMA_X64FRE_EN-US_DV9' is only 5.27 GB. This is the Win10_2004_English_x64 version, the 1809 version should be similar size. So there is enough space on the USB stick for the file.

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Answer 3

Loner T

Level 9

59,471 points

Oct 4, 2020 9:15 PM in response to rcwhiteley

It is not a total disk space issue. The file system used to build the installer has a limit on the largest file it can handle.

FAT (16-bit and 32-bit) only support individual files smaller than 4GB.

exFAT can support individual files larger than 4GB.

W10 1903 have one specific file which is larger than 4GB, not the whole ISO.

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Answer 4

rcwhiteley Author

Level 1

8 points

Oct 5, 2020 12:19 AM in response to Loner T

Found it now, the W10 1809v2 ISO install.wim file 4.61 GB. Is there a way that I can setup the bootcamp using exFAT file system? I was looking at a way to do this, I would have to download the bootcamp 6 drivers or something myself and but them on the USB stick or something, I didn't manage to do that.

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