Dear Support Team,
Your file management fails to load sub folders even for local folders in ipad/iphone. It is very inconvinient to select files to play everytime from different sub folders.
In addition to above problem your file browser api fails to display SMB files and sub folders. This makes your feature very weak when it comes to using network shared drives as a source.
Can you please look at a streamer app called MusicStreamer they do great job with file browsing. If they had toogling between songs I would definitely prefer their app for basic music playing.
Your app is great other than file management and this is a very easy problem for you to solve since there are ready to use libraries for this. Looking forward to use your app after this fix.