So I bought a WD Green 3TB and made two partitions > 40Gb and the rest as second partition. Since the second partition is more than 2.2 TB I had to partition entire drive with GPT. I was not able to install windows 8.1 from a flash drive on it. Later I realized I had to enable EFI from BIOS, which I did but the BIOS had no option of enabling EFI Boot from USB HDD, only CD/DVD. Does this mean I will not be able to install windows on a GPT partition with a USB flash drive or am I missing something? Anyone using windows on GPT partition installed with a flash drive? Thanks.