Nativelly how to know the writeable/shared folder of the app?

I need to write a plugin that save to the readable/writeable persistent path of the game.

Is there a way to know?? or should I pass the value somewhere at runtime?

If you want to do this in C#, just construct a path to the app’s Documents directory using:

Application.persistentDataPath + "/" + fileName;

If you want to do this using Objective-C native code, you will need to access it like this:

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDir = [paths objectAtIndex:0];
NSString *myDocumentsFolderFilePath = [documentsDir stringByAppendingPathComponent:@"myFileName.txt"];