Hi
I have just figured it out today (with very sad speed though of 36mb/s from a nice SSD. not enough juice on the bus is what i'm thinking.)
Following a post https://tinkerboarding.co.uk/forum/archive/index.php/thread-1040.html and a youtube from that post https://www.youtube.com/watch?v=XLlMWfDfpzw
The version of TinkerOS you need is the 2.0.11 and not the latest. that still has the 2 partitions.
In that you will need to delete `console=<something>` and add the `root=/dev/sda1` or whatever device you are using just instead before the `rw`
Good luck and do report the speeds you got to.