I had a bad experience with one UASP caddy, I must admit (a Sabrent) -- it's fine on my Mac and doesn't work on the Pi. (Even after the manufacturer firmware up

I had a bad experience with one UASP caddy, I must admit (a Sabrent) -- it's fine on my Mac and doesn't work on the Pi. (Even after the manufacturer firmware update that says it should). I found a reliable way to test it was to try to load a 1.5gb database into mariadb. The caddy I am using is this one, if it helps you at all: https://www.amazon.co.uk/gp/product/B00FCLG65U https://www.amazon.co.uk/gp/product/B00FCLG65U Discontinued but I think any replacement Inateck should be a good choice. I think even the newer Sabrents should be fine but I don't know. This Inateck caddy is excellent; it's the one I have been recommending. Though I'd like to test some M.2 stick adapters. (I'd originally begun to devise a Pi 4 SSD appliance for one of my customers to sell with their database product, but the chip shortage has put paid to that.)