Does anyone have any experience with Sync-in for online files?

https://lemmy.today/post/48563874

If you just want file sync, the obvious option is SyncThing. It’s established and highly regarded.
It doesn’t support offline files though. I can’t dump a few hundred GB on there and then access it from my phone etc
I dont understand what you mean. As in that client a can dump files, go offline and client b can go onlineel and sync these files afterwards?

Sorry, brain fart moment.

I meant online only - the complete opposite of what I wrote …

I want to be able to upload files and have them stored on the server and only downloaded when needed (or if I mark them as always downloaded)

I don’t need or want everything on my laptop or phone (requires lots of storage!), but want to be able to get them easily when I do.