I recently did some research - and, after a couple of years of “thunderbolt” - there are only very few drives on the market. Talking about 2,5’’ drives here btw. There is one drive which comes in 1TB - it is from Bufallo. Do a search.
Interesting for me is, that it has USB3.0 as well, that way I could “fill” the drive on my Studio DAW (Windows7) and use it on my MacBookPro. I went SSD recently which made a new Computer out of the Laptop - but coming from 750GB hd now with 500GB SSD I am missing some storage space…
But I do not know if there will be any latency. I would say: No. I can work even from a USB2 drive quite fine, as long as it is not TO complex… Thunderbold should be way faster… AFAIK about 20 times compared to USB2?!
I dislike the fact that all thunderbolt stuff is expensive as hell…