This is the cheapest 4TB SSD you can buy — Team Group T-Force G50 EVO Gen4 SSD costs $370 or $0.09 per GB, $554 less than Samsung 990 Pro

The Team Group T-Force G50 EVO Gen4 SSD is the cheapest 4TB solid-state drive I can find, and it's much cheaper than Samsung's 'stellar' 990 Pro.