I have stored all of my photos, the originals and the edited photos, on a harddisk. At least once a week I make a backup on a separate harddisk. I am also planning to make a third backup on a cloud drive, but this is some work for the wintertime ;)

So, if Steem goes away, it won't be a big problem for the photos, but I think, when I have enough time I want to download also the posts, because some texts are quite nice, as well as some comments are worth to be saved securely ;)