Use "Create ISO" first, then burn that ISO to USB using Rufus. This avoids write errors.
Windows 7 does not natively support USB 3.1 Gen 2 (10Gbps). The Intel utility only enables 3.0 (5Gbps) support. windows 7 usb 30 creator utility intel download center full
It will ask you to select your Windows 7 USB installation drive. Use "Create ISO" first, then burn that ISO
In the search box, type exactly: (without quotes). Press Enter. Use "Create ISO" first