Crystalmark is a useful benchmark to measure theoretical performance levels of hard drives and SSD’s. We are using V3.0.3.

The 4K read/write random performance from the G-Speed Shuttle is pretty impressive with the disks in the default RAID 5 mode.
Tags 4-bay external hard drive G-Technology Review Thunderbolt 3
This packs in a 4th Gen Tandem OLED panel from LG, and it's cheaper than you think