I installed Windows 8.1 on my Samsung 850 EVO 250gb SSD and all of the drivers for my PC. I created a new simple volume for my 3tb HDD and 746gb is unallocated and I can't do anything about it.
Specs:
Mobo: ASUS Maximus VIII Hero
CPU: Intel Core i7-6700k
GPU: GIGABYTE G1 Gaming GTX 980 ti
HDD: Seagate Barracuda 3tb
SSD: Samsung 850 EVO 250gb SSD
RAM: G.skill ripjaws V 16gb (8x2) 3000mhz RAM
ODD: ASUS BW-12B1ST
Case: Phanteks Enthoo Pro Full Tower Chassis
Specs:
Mobo: ASUS Maximus VIII Hero
CPU: Intel Core i7-6700k
GPU: GIGABYTE G1 Gaming GTX 980 ti
HDD: Seagate Barracuda 3tb
SSD: Samsung 850 EVO 250gb SSD
RAM: G.skill ripjaws V 16gb (8x2) 3000mhz RAM
ODD: ASUS BW-12B1ST
Case: Phanteks Enthoo Pro Full Tower Chassis