Windows – Is 4GB of space enough for Windows 7 bootable USB flash drive


I am wanting to create a bootable USB flash drive, not one to install Windows from.

On my desktop, Windows once installed takes up 10GB+ of space. But on many websites it says 4GB is sufficient for a bootable USB. Why is this?

Best Answer

A bootable USB to install Windows 7 should be at least 4GB. However, to use Windows entirely off of your stick it should be at least 16GB for 32-bit or 20GB for 64-bit.

So generally it would be best to use a 32GB stick if you have one. See this official Microsoft page for the minimum Windows 7 system requirements.

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