Modern PCIe 4.0 and 5.0 SSDs get pretty warm because the powerful SSD controllers make a lot of heat, like any >1GHz processor. If you expand your PlayStation 5’s internal storage with a fast PCIe 4.0 SSD like Sony recommends, the system offers very limited cooling. Folks who are concerned about the longevity of their SSDs might take a look

Source: Hot Hardware – Unique PS5 SSD Cooler Utilizes Airflow From Main Fan To Allegedly Cut Temps In Half