We usually recommend self-backup of episode audio files. However, you may still download it through Firstory Studio and RSS:
Download from Firstory Studio
Log into your Firstory Studio account. Go to Contents > Episodes > Select which episode you wish to download.
Click on the three vertical dots (…) on the far right side of audio player and click Download.
Download from RSS feed
Open your podcast's RSS feed.\
Use Ctrl + F to search for the name of the episode to be downloaded.
Look for the URL between "enclosure url" and "length."
It usually begins with "https://backend." and ends with ".mp3", ".mp4", or ".aac", depending on your audio file format.
Open this url in your browser to download the audio file.
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