Looking to set up a photography PC slash storage. Below is my disk drives

• 500GB SATA Barracuda
• 2.0TB SATA Western
• 2.0TB SATA Western
• 500GB ePCI NVMN --- use this as the PC

It occured to me, if I partition the 2TB in 4x500GB, and same for the second one, I have 9 500GB partitions. Allowing Raid with 3 partions (one from each drive)

My Question is: the remaining 1.5TB in 500GB chunks on each drive (so 3TB total) - can I then use this as per normal, as in not part of the RAID setup?

EDIT: Raid Mirror if it was just the 500GB x 3, so mirror and have an extra redundancy drive?

Open to Striping two of the 3, but as I understand it, that would get me 2x speed accessing 500GB across three drives, but zero redundancy, in fact higher risk of data loss if one of the two Western HDD failed. Then Mirror the pair striped, to the Barracuda for redundancy

EDIT#2: Windows 10 System - https://uk.pcpartpicker.com/list/2s9nyg