I bought a Areca Thunderbolt RAID Enclosure ARC-5026 4-Bay, which i have filled with 4x2tb hard drives. I have been advised to set it using raid 5. I've got to a stage where it says 2TB support... I have 3 options... No Use 64bit LBA Use4K Block I know nothing about raid, so don't know what to choose. I will be using the Raid system to edit video on and store video on.