I just cannot understand why anyone would want to rely upon a cloud based service to store their data or even as their primary backup.
Hard drives are incredibly cheap (up to 2 TB for around $100) and much faster to access than even the fastest broadband internet connection. Data can be priceless.
I backup my entire network onto secondary hard drives throughout the day. Once a day I also backup everything to a removable hard drive, which I take home at night (I have several and rotate them). Finally, I also backup everything to a cloud based service.
If my network fails, I can immediately retrieve my data from one of the secondary hard drives, and only lose at most a few hours of data. If my office burns to the ground, I can retrieve everything from my removable hard drive and only lose at most one day's worth of data (all of which can be retrieved from the cloud service).
The only thing I have on the cloud is a copy of my music so I can play on any device (phone, pad, PC, laptop) anywhere. Or play on someone else’s device in a social setting.
For away from the internet devices, I just download key playlists.