Posted 14 February 2017 - 04:44 PM
My trust in an cloud storage option (even the well established ones) is always limited. My attitude is that the only person who will ever care as much about my data as I do is myself. As such, the way I look at it is that if I want my data backed up on a regular basis in a way that assures I will be able to retrieve it, then that means I always need to do some local backup/storage of my data. While an online cloud storage (or backup) option should also be backing up their storage servers, there is no guarantee that they will go out of their way to restore something that got nuked for any number of reasons. So, for me personally, any data that I put online, I also have at least one copy locally (but typically more than one copy).
And then there is the issue of privacy. There are just some things/data that I will NOT store online.
After that saying all that, it is really a personal decision. When I do use an online cloud service, I tend to go with the larger ones with an established reputation. But, then I am also more than willing to pay for such services, so I am not overly concerned with how much free online storage they offer.
So, really it comes down to how much potential risk do you want to take. You likely will never truly know how likely it might be that any such online cloud service might go out of business and disappear with little to no warning (I would tend to assume that the larger ones with well established reputations might at least offer a substantial warning so that you could get your data off the servers). So, I cannot say how likely this particular service is to stick around or how they might behave in the future.
And that is why my best suggestion is to point back to my first paragraph...and recommend to keep at least one copy of any data local. Of course, this then means more local storage (i.e. maybe an external hard drive). And additional local storage will not be free the overwhelming, vast majority of the time.