[mdk754]

I too have been using Copy for years.

Let's not forget they have a working Linux client. Maybe things have changed since I last looked, but they were one of the few supporting Linux (both cli and gui).

[Lunatic666]

I just recently found it moved over from Dropbox, too. - Quick and competent support - Linux sync client - Apps with Photo sync (Since yesterday also for iOS)

I can even use the photo sync from multiple devices because it creates folders per phone