Platform (Website): Website
Browser, if a website issue (Chrome, etc) : Chrome
URLs (aka web addresses) of any relevant observations or pages: https://www.inaturalist.org/observations/upload
Description of problem (please provide a set of steps we can use to replicate the issue, and make as many as you need.):
Step 1: choose a sound file with .3gpp
Step 2: drag it to the "upload " web page
Step 3: it falied to be dragged