You drive an RV across the US. Cell service is spotty.
: The first step is to collect or create a list of 10,000 media files (either audio or video) that you want to include in your playlist. These could be files stored locally on your device or URLs of streaming media.
Before creating the list, move all 10,000 files into a single master folder on your portable drive (e.g., USB_DRIVE/Music/ ). Keep your playlist file ( .m3u ) in the of that folder.
Large "free" playlists often contain broken links. High-quality 10,000+ lists are usually "Premium" subscriptions that are updated daily by a provider.