https://wccftech.com/spider-man-miles-morales-crossgen-saves-file-size-ps5-ps4/

As the release of the PlayStation 5 inches closer, the issue of crossgen saves has become a bone of contention. As we’ve learned, games like Marvel’s Spider-Man: Remastered and Yakuza: Like a Dragon won’t let you transfer your PS4 save files to the PS5 versions of the game. So, does Sony just have a standard anti-crossgen save policy? Well, not exactly. A Twitter user recently asked Insomniac's James Stevenson whether those who upgrade from the PS4 to PS5 version of Spider-Man: Miles Morales (which is free) can also transfer their save files, and he gave a simple answer…

— James Stevenson (@JamesStevenson) September 28, 2020