I have a ZFS XigmaNAS I setup at work using an Optiplex 7040.
CPU: i7-6700
RAM: 16 Gigabytes of DDR4
Storage: 2 500 gigabyte sata SSD in a mirror
I can write files to it at gigabit speeds and read/open 130 megabyte photos in about a second... no issues there.
One of the folders on the NAS...