azslow3
It depends from the part of the world. More precisely from the place you are. If I decide to do online backups, that will be yearly backup. I mean it will take a year till it is complete
Good point but perhaps I should have clarified a bit. The recommendation for online backups is always (or at least should always) be predicated on the assumption that sufficient bandwidth is available.
Its certainly true (and I myself learned first hand the hard way) that there are still vast portions of real estate in the US that lack any kind of viable broadband option. But you tend to find that most of that real estate is what is known as 'the fly-over states'. Its called fly-over because most people don't go there but rather fly over it while going to the population centers. Which is why I used the word most instead of the word all when I said described the number of people that cloud based is good for.
And yeah, before anyone calls me out on it I realize there are people from all over the world on this forum. But its been my experience that the US is far from the only country where the population centers have multiple broadband options available and less so in the sparsely populated bad lands.
The thing that I don't like about NAS based (or any kind of local based) rolling backups is that it requires both software and hardware to remain trouble free. Either one has an issue and the backups break. And often, no one on site has any idea their backups are broken until they need to do restore and can't. Seen it many times.
With online backups, the software is simpler and there is no hardware component. Or rather the only hardware component is the internet connection. When your backup NAS down in the basement breaks, you often figure it out two years later when you need to do a restore and can't. When your internet breaks, you find out 57 milliseconds later when half the building starts yelling. Long term, cloud based is more reliable and in my experience the difference in reliability is night and day.
But cloud based should only be used for active data. If you've got 57TB of garbage, that's not active data, that's... well... garbage. If you want a backup of it, buy hard drives, make copies and store them off site because chances are 56.98TB of it hasn't changed since Truman was in office and won't change ever. Use physical media to make one or two copies of static archive data and keep them off site. Done. Use cloud based for everything new that comes in after and even a modest broadband connection will be more than sufficient. Even in the age of 24bit/96kHz audio and 4k video.
And if you're living out the sticks with no broadband, then either learn to actively verify your on-site backups every month or hire someone who will do it for you.