Addressing in hex file

Ok, about the hex file, I think I understand well know the different modes (16, 20, 32) now.

For the general addressing question, I understand what you say. But my question is why the memory location is not 32 bits instead of 8 bits ?

I made a schematic with both mode to be sure that we be well understood. The table on the left is what is done, i.e. a memory location is 8-bit depth, The table on the right is what I think about, i.e. the memory location is 32-bit depth.