POST allows you to upload work parts and web-exclusive audio to be shared online. This can be done using the Media Panel, which can be found on the right side of the Browser page in POST.
Once the Media Panel has been expanded, you can view your previously uploaded work parts in your Library, and you can filter by type if needed.
You can then click Upload to add additional audio work parts. For each upload, you'll assign it a Type (i.e. Talk, Liner, Commercial) and give it a name and description.
You can check Add to playlist immediately if you want to use this audio once and never again. Otherwise, you can leave that box unchecked, and you'll be able to choose the audio from your Library tab.
About "Types" - There are several default types available in POST, but more can be added. See Configuring Audio Categories in POST for more info.
Once you have uploaded your audio work part, you can add it to a playlist to be published online. Any item in the Library tab can be added to a playlist with the "plus" button, and you can also add elements from the live stream to a playlist the same way.
Once you've created a playlist, you can either download it, play it back in the browser, or save the project (which will allow you to post the audio to your website and social media the same as you do in the POST screen).
To delete a file from the Media Panel library, simply hover over the clip with your cursor and click the "-" (minus) button