Hi Emilio,
We have not implemented a hard limit for the max number of files a project may contain. Some users have projects that exceed 600 files. The key constraints on the App Center Builder service is maximum size of all files (not to exceed 50Mb). Also such an app if not optimized may load very slowly and perform poorly. We have been hesitant to implement a max file limit because it is an arbitrary limit.
But having said that there is always a practical limit at some point. Just the idea of 600 files in a project seems to beg the question is this really a mobile app or something much bigger jammed into a mobile app form? Just ask’n.
Our guidance is to strive to keep your project well under 500 files. The smaller the better across all dimensions of your project.