I think maybe your USB Chip is formatted NTFS you need to clean it and format it Fat 32, Reason you are dealing with a UEIF GPT system, NTFS USB is not compatible at the base level.
Also check out the thread
upgrade notes and guides
G752VY-DH72 Win 10 Pro
512 GB M.2 Samsung 960 Pro
1 TB Samsung 850 pro 2.5 format
980m GTX 4 GB
32GB DDR 4 Standard RAM
Z97 PRO WiFi I7 4790K
Windows 10 Pro
Z97 -A
Windows 10 Pro