Is there a limit to the file storage size of "Application.persistentDataPath" in Android/iOS?

Unity Engine
1

I am using Application.persistentDataPath to cache multimedia files which may add up. I can easily manage this to delete unused files and keep the folder not too big. But I am wondering if Android/iOS have any internal monitoring for the size of this folder and will throttle me at some point.

I presume the operating systems would not let me expand this folder until the entire hard drive space is used, or would they? I don’t intend to do so but I need to know if they will crash my app or do something else past a certain storage.

Secondary to this question, to help with space management, is there any way (even with native iOS/Android code) to detect the amount of free disk space so I know how much room I overall have to work with as well? This would help me know how much I can cache.

Thanks for any thoughts on either point.

2

It’s not a good plan to find out how much space is free, to decide how much you can take later. Other things can happen to the available space at any time. Write a 5MB / 5GB / 5TB file and if it fails, your app has an answer and can decide. That said, if I ever saw a game app taking a huge portion of my space without asking me first, it would be un-installed immediately, followed by a ★ review.