Did you put the small plastic piece that locks and an unlocks the SD reader from writing to it?
You can add a small piece of tape across to enable writing to the SD adapter.
Use Winhiip to format HDD.
Make sure you set the jumper to master when installing to the NA.
I have use TOXIC OS, HDLoader and OPL working with my 1.5TB HDD.
I can install an adapter and included the custom SD card reader for you. You will be able to read and write your NAND. If you go back a few pages you will see my work.