Yes, you can include a Windows ISO along with other files on your USB storage.
Yes, you can include a Windows ISO along with other files on your USB storage.
Theoretically it works, but in practice I’d caution against it. You seem to be considering a terabyte external drive (USB 3?). It’s not the best choice since I don’t really trust external OS installations—they’re prone to being rewritten. They’re okay for storage though. I’d suggest opting for an internal drive instead, as they’re very affordable for a 1TB WD Blue that will handle it. A similar thread is here: I agree with XY Man—your speed might not be ideal and there could be issues.
You can add a folder to the stick and put all the drivers and files in there. There's also an alternate method which is way more technical but also more aesthetically pleasing.
It looks like everyone who responded didn’t grasp your request. I’m using a 16GB USB drive for this task. Along with other tools, it runs ESXi 6, Windows 7 x64 Home/Pro, Windows 8.1 x64 Pro, and now Windows 10 x64 Pro ISO files. These can be chosen or booted through the menu (it uses grub4dos). The software I’m using to set up the USB is BOOT_USB, which is my first time posting here—please check if there are any posting limits for newcomers: http://www.911cd.net/forums/index.php?showtopic=24424