I use this with a Google Drive folder to add new Wallpapers to my Desktop.
If
New hot post in subreddit
This Trigger fires every time a new post becomes one of the ten hottest posts in the subreddit you specify.
Then
Upload file from URL
This action will download a file at a given URL and add it to Google Drive at the path you specify. NOTE: 100 MB file size limit.
Explore more great ways to automate Reddit and Google Drive