In the end, if everything above fails. The Windows PE bootable media can be a CD/DVD disc, USB flash drive, or ISO image file, so you can choose the most convenient one according to your preference.GPT and UEFI are tricky things, don't behave as expected on different hardware, so try booting from MBR formatted drive (USB), Rufus can do that for you.AOMEI has an option for creating an ISO file, in the same section of the program where you tried creating a bootable USB, try creating ISO first then create bootable USB with Rufus.File system usually isn't important for booting from USB, unless you are doing UEFI install, then it must be FAT32 formatted, although that problem was also exceeded lately with ISOs bigger than 4GB.So if the drive is apparently empty, it doesn't mean it isn't bootable.

When you play with boot tools these things are common, Rufus, Sardu, and Easy2Boot do similar things to your USB drive. If Explorer doesn't show anything on the drive, it doesn't mean the drive is empty, check hidden stuff or even sub hidden (invisible) system data, 7zip can see those.I remember there were some problems with boot options from AOMEI, in the time I was thinking of going to use it.

Aomei iso bootable