maybe u can help me..

If i send "mp3" through my created app it is always a "unknown file"

maan im try and failing like 12 h now.. nothin to find on google or stackoverflow about exactly that problem.

The file also is named then for example as xyz instead of xyz.mp3
And via WhatsApp it only sends an "unnamed document"
wtf man im out of solutions. if you want i could post code