Oke, i managed to fix it.
Apparently i have been misreading it almost for a whole week.
I was mixing " Step3: Boot the board to Maskrom mode" with " Option 1: Operate on ROCK 5B". But these headers in the wiki have NOTHING to do with each.
In reality how you should follow the tutorial is as following when using a external computer (Linux in my case).
- Step3: Boot the board to Maskrom mode
- Step4: Write U-Boot images to SPI Nor Flash or erase SPI Nor Flash
- Option 2: Flash with Linux PC/Mac
The person who has created this wiki in this order…bro, you really did succeed in making me almost go mad, by putting this in the middle " Option 1: Operate on ROCK 5B". Very frustrating week indeed.
I used Linux and off course with the necessary troubleshooting to get to compile the flash tool (installing the dependencies). Afterwards, just follow the steps in the CORRECT order, then it is done within a few minutes.
Managed to boot Ubuntu on the NVME.