Saving

[ocean coyote]

I their any other way to save then player prefs and json cause I want to clone a prefab with different things on this script on the prefab using code in a built project cause I can not use Unity Editor Either

[uneven barn]

There's C#'s BinaryFormatter class. Also, can you further clarify what exactly you're trying to save, here?

[lofty mauve]

There is also CSV or Comma Separated Values.

[ripe flame]

Unless I misunderstood your question, I believe you can just call instantiate and pass in the existing instance and it will instantiate a new one with the same script values as the instance. Either way you shouldn't need to save to playerprefs to copy values at runtime; You can just store them in memory.
The only time you'd need to save values externally is if you need them to persist across sessions.

[spiral matrix]

If i understand correcty yes, you can use the C# Stream file class

You can also compress and convert to binary

in order to make your files more safe

For unity use .NET STANDARD 2.1 API ( if unity is 2018 or older)

https://learn.microsoft.com/en-us/dotnet/api/system.io.streamreader?view=netstandard-2.1

Reading file