What's the best way to store links and images for later use?

I'm looking for a mobile and possibly privacy-friendly (or straight up offline) way to store links, images, videos I want to save for later use.

Right now I'm using a private discord server as I like the vertical messaging-like scrolling, infinite storage, simplicity, "cloud", links preview and general feel, but it's not the best obviously. The risk of sending stuff to a friend/other person by mistake is also high, my app bugged and sent files to another person instead of …

cloud discord general images links messaging mobile offline preview privacy private server storage store videos