I use SyncMe which synchronizes smb shares to your phone. It’s great once you have it set up, but it does take a little setup. Gotta have shares and whatnot.

What about this one that you’re on right now?

That’s a much classier way of calling someone a digital hoarder :)

What makes you think I didn’t already download everything I want?

Like you mentioned KDE Connect will sync your clipboard between Android and KDE. The KDE clipboard also has a history and you can run actions on clipboard entries which is super handy. I’m not sure about this snippets library, sounds like a permanent clipboard history that you can search, where the KDE one just keeps the last X copied things. I’d rather have my phone keyboard learn words I type a lot personally.