Don’t waste money on all-in-one solutions when you can pick and choose better components yourself.
Probably one of the best 1TB prosumer SSDs you can get right now, $159 (2TB for $308)
And here’s a decent Thunderbolt 3 case for it with 50cm cable. $76
https://www.amazon.com/WAVLINK-Certified-Thunderbolt-Enclosure-External/dp/B07YB4DDRB
For less than $250 shipped, this combo will give you 2,500 MB/s throughout. Obviously, if you want to see that kind of performance over sustained periods, you’ll need an actively cooled enclosure. Or just point a fan at this one. ;)