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Created August 16, 2025 03:11
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save_usb.md

Saving Your USB from Rufus Defaults

Don't pay the cost like I did. Large ISOs (>4 GB) + wrong settings = an unreadable USB or a wasted stick.

TL;DR

  • UEFI system + 5.9 GB Ubuntu ISO $\Rightarrow$ Do NOT use default setup (FAT32, even though Rufus ISO includes many files each less than 4GB, I don't know why but it can break, probably regarding wrong logic, anyway, you shouldn't just throw it in with the default values without even reading it, just because you’re busy.).
  • Use Rufus $\to$ DD Image mode (safest). Windows may not "see" the USB afterward-that's normal for boot media.

Check your firmware

  • Win + R $\to$ msinfo32 $\to$ BIOS Mode = UEFI (good).
  • If you must support old PCs, you’ll need MBR later-but for modern UEFI, GPT is standard.

Rufus Working setup

image
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