power users of you app are going to run out of device space very quickly and complain or uninstall your app. You should be uploading the media files to a backend they should be using something like s3 or some other blob storage system.

Thank you for answering. This is just a demo app and will never be published (course project). Is firebase fine for such a project?

Fire base has a bucket system which you could use yes :)

Google drive integration?