[S922X] Ugoos AM6(+), Help & Support

Hello there. First thing, BIG thanks to CoreELEC team for this great OS.
I have got a new UGOOS AM6b+ and trying to install the CE 21.2 (nightly, generic) to its eMMC. Booted it with uSD card, no problem.

SSH, ceemmc -x, #1 option (Dual Boot)
“Not enough space on eMMC for the installation “
“Continue?”

It has 3799Mb free space .
I used this guide for the installation, [Guide] S922X-J (Ugoos AM6b+) CoreELEC installation and FAQs
I’m paralyzed so my access to my computer is limited (will be using my computer tomorrow, I will copy and paste the SSH if needed). I wanted to ask so I can be prepared.
Should I factory reset the AM6b+?
uSD card is 16GB Verbatim (premium class 10) , should I rewrite the image?
Bad box?
Thanks