which SSD and HDD should I choose?

[Phreakie]

I have a pc with these specs and I need an advice on choosing an SSD and a larger&newer HDD
CPU: Intel Core i5-6600K
GPU: Nvidia GTX 1070
HDD: Seagate Barracuda 7200.14 2TB
RAM: HyperX Fury DDR4 2666 C15 2x8GB
MBD: Asus Z170 PRO GAMING


Which type SSD? PCI, SATA or M.2?
Also which hdd? 4-6 TB

 

[Phreakie]

Thread can be closed

 

[eXuberanxe]

(Only made this account today so I'm sorry for a late addition) Don't know what budget you have but from a performance perspective the best:
3TB HDD - Seagate Barracuda (ST3000DM008) | 4TB, 5TB and 6TB HDDs are all the WD Black
For SSDs it depends. In this special case the Samsung 960 Evo 250GB (an M.2 SSD) is the same price as the 850 256GB Pro Series but the 960 is obviously many times faster. http://ssd.userbenchmark.com/Compare/Samsung-850-Pro-256GB-vs-Samsung-960-Evo-NVMe-PCIe-M2-250GB/2385vsm200373