I have three of these drives (V1 model) that always worked perfectly with 2.5k and 4K ProRes.
However with 4K Raw at 30fps I would get about 15 seconds before dropping frames. Then I did this procedure. Thank you Robert Niessner for mentioning the secure erase and over provisioning and to Kohli for mentioning the newer firmware:
1) Upgrade firmware from R201 to R211
2) Secure erase drive using Parted Magic
3) Format drive to 365,000 MB, exFat, 64kb allocation size
Voila! Just recorded 38,024 files without any being dropped. Just over 21 minutes
Now the SSD was burning hot when I took it out. Not sure if that is of concern.
For my next drive I'll try just the firmware update and the 64kb allocation size and see if that is successful or not.
Anyway I know that this is a popular drive out there so hopefully this helps some people.