How much SSD Can You Handle?
How about a forty (40) terabyte SSD?
While 40TB is a jaw-dropping amount of SSD storage, bite off as much as you can financially chew for performance that is throttled by Thunderbolt 2.
It should do about 1650 MB/sec when a Thunderbolt 3 version of the OWC Thunderbay 4 Mini enclosure arrives (just swap the SSDs), though that hardly matters given how it flatlines at 1360 MiB/sec = 1425 MB/sec.
See my review of the OWC 40TB SSD.