Off-site backup is the proper answer to your question. All this really depends on your own tolerance or comfort with the possibility of losing data. The rule of thumb is that there should be at least three different copies of your data, each in a different physical location. For each of them, there should be redundancy of some kind implemented to guard against hardware failure. Redundancy is typically achieved by using mirrored drives or by using RAID of some kind. Also, if you’d like to know, using RAID in which you can only lose one disk in the array is not typically considered a sufficient level of protection because of the possibility of a cascading drive failure during replacement of a failed disk. It should be at least two.
I’d say it depends on your circumstances and your tolerance to the possibility of data loss. The general answer to the question is that without using some kind of redundancy, either mirrored disks or RAID, the failure of a single disk would mean you lose your data. This is true for each copy of your data that you have.
Surely that's not going to turn into a bigger problem (startrek.website) angielski
got the disk space and the bandwidth to spare so (sopuli.xyz) angielski