Since you can tell what day/time the news download is to run, if you have the Content Server running, I would think you could expose it to the internet so you would be able to access it from anywhere.
https://manual.calibre-ebook.com/ser...n-the-internet
Another option is to have a windows scheduled task (or cron job in Linux) that could bundle up all the epub files and push them to Google Drive, Dropbox, or similar cloud service.
Have a look at BookFusion (and the Calibre plugin), it might help out here as well.
https://www.bookfusion.com/