Hello,
Unfortunately, since elements are created before the running order is determined, naming the audio elements after the order in which the trials are run would be challenging. You could always try uploading an edited version of PennController_media.js to your project, in which you replace let fileName = PennEngine.utils.guidGenerator()+'.zip'; with something like let fileName = PennEngine.utils.guidGenerator()+'-'+PennEngine.controllers.running.id+'.zip'; to overwrite the MediaRecorder element
Jeremy