If you find a legitimate ISO file matching this description, here is how the process generally works. (Note: This requires a modified console).
The peak of "3000 Jogos" sharing was between 2008 and 2015. Hosts like Megaupload and RapidShare are gone. Modern backups exist on Mega.nz and Internet Archive, but they are often labeled cryptically to avoid bots.
The number 3,000 is largely psychological and technical:
The SNES, released in 1991, was a powerhouse of 16-bit gaming. With a library of over 1,800 games, it was home to some of the most beloved titles of all time, including:
Instead of managing 3,000 individual files, you have one single "game" on your list that holds everything.