I like Fossify Messages, personally, and because I also like handling texts from my desktop, I have a Matrix bot to forward them to my Element account.

I’ve been using rsync.net for a while now. It’s been stable, fast, and relatively inexpensive. There’s also the benefit that it’s easy to script automated backups directly to it. For more Dropbox-like functionality, I have a Nextcloud instance that uses rsync.net as external storage. It’s been great so far!