I back up all my mobile phone data regularly, including photos. First on the laptop. From there, I transfer it to two external SSDs, along with the rest of the laptop's data. After all, an SSD can break. Even within the warranty period. Or it can break through one's own fault. The quality of the photos is not damaged. Copying is done 1:1.
I don't know how many years the photos and data on an SSD will remain undamaged. But a Digitec technician can certainly help.