Re: Error Code 0 when trying to save over save file PS4
@Brookeeryn there's a master thread here for players affected by error code 0. There seems to be various causes and outcomes:
There's a similar thread here with help steps that have worked for some players:
I personally had to start a new game and now I always run a backup as a second identical save file. But that's just me, it was drastic and we all seem to be different. I get error codes when I've downloaded from the gallery or taken photos, so I now avoid both. It's a shame but I personally find it's absolutely necessary. But on a positive note is a known issue so will hopefully be addressed in an upcoming patch in the future.
I hope the recommended fixes work for you, good luck!