Instead of processing each ISO image individually, why not take advantage of the large capacity of modern USB drives and load them all at once? Ventoy is one project pointing in that direction, but there's an even more flexible and advanced option: Easy2Boot.
Usually, you have to process each ISO image individually with tools like the ever-reliable Rufus, and then there's BalenaEtcher for all .img images (think Raspberry Pi-compatible operating systems or alternative environments like Batocera).
However, USB drives and external units have large capacity. Why not use it more efficiently? We previously talked about Ventoy, undoubtedly the simplest method for loading multiple ISO images on a USB drive, but if you need to work with more exotic images or modified environments, it might be better to test with Easy2Boot.
How to load multiple ISO images on a USB drive with Easy2Boot
The learning curve for Easy2Boot is a bit steeper than usual, but all you have to do is follow the path created by its wizard. After confirming the data wipe on your drive, the Easy2Boot installer will ask whether you want to add agFM (a grub2-based boot system – say yes), the classic Ventoy, and all its plugins. These steps require an internet connection to fetch the latest files, and you might see a few “incorrect function” errors, but they can be ignored. The goal is for the installation screen to turn green.
Once the USB drive preparation is complete, you'll find two partitions: the first is named E2B_PTN2 and doesn't need modification; the second contains the _ISO subfolder. That's where you should focus your attention. For example, Linux ISO images are copied directly into the 'Linux' subfolder, but for Windows, images go in the third level, i.e., '\_ISO\WINDOWS\XP' for Windows XP, '\_ISO\WINDOWS\WIN10' for Windows 10, and so on. Make sure to use a relatively fast USB drive, ideally USB 3.0, or you'll spend a good while waiting for transfers.
The last step is to boot your computer from the USB drive and choose the ISO image you want to load. Granted, Easy2Boot isn't the most intuitive program in the world, but I guarantee it's worth your time. While the idea of loading multiple ISO images on a USB drive isn't new, Easy2Boot's versatility puts it in a different category. Personally, I use it a lot when installing Windows XP via USB, something impossible with its traditional installer, and ideal for old machines without optical drives. Give it a try!
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