How do professional photographers save photos?

The original picture must be kept. Therefore, professional photographers or photography organizations usually have multiple large-capacity storage devices for storing various pictures. Because commercial photography involves personal privacy or property rights, some organizations will not keep customers' photos for a long time, but there are still many organizations that will keep customers' information privately, especially some better pictures. And those professional photographers or photographers who are not commercial photographers will keep a lot of original pictures, even some imperfect pictures. These materials may be valuable in a few years, hehe.