It's weak for Samsung, one of the world's largest device makers, to say they're "having problems" with such a basic thing as cloud backup. It's a core component of the user experience, and I for one have just gotten used to trusting it implicitly. If I make a note on my phone, I believe I can get it back even if the phone died or is stolen - or blows up. It's just worked for years, and if I hadn't been trying to clear a bit of drive space I wouldn't even have known that I'm not backed up. Trust is vital.