Max storage avaiable dell g5 5590

Hi everyone,

I can't understand the maximum storage for my Dell. I currently have the basic configuration with 1tb of hard disk and 128 of ssd PCIE. I would like to replace it with a samsung 970 evo of 500gb, but I don't know if the limit is set at 1256 gb (more often) or at 1500 gb.

could anyone help me?