According the size of BIOS,I doubt that F3n (3TB+ HDD support ) is implemented in final F3.
So,
3TB+ HDD support is in F3n,F5a,F5c and latest F5f (on TT forum).
As BIOS is different (bigger) size,you must flash only with @BIOS or FLASHSPI.EXE.
Q-Flash will give you error.