Backups and redundancy schemes are both data protection methods, but they are not interchangeable.
Redundancy is a data protection method intended as a real-time fail-safe measure against hard drive failure. RAID (which stands for Redundant Array of Independent Disks), HyperV Replication, OneDrive and Dropbox is practical examples of data redundancy.
A data backup, on the other hand, doesn’t provide real-time protection, but it does provide protection against a greater set of problems, including failed drives, device theft, fire, or even just accidentally deleting files.
3-2-1 Backup Strategy
We believe all clients should have minimum a 3-2-1 backup strategy.
This means having at least three total copies of your data, two of which
are local but on different mediums, and at least one copy off-site.
We’ll use “rusty.jpg” as an example for this scenario. Rusty.jpg lives on
my desktop computer; it was a picture that I took of my dog in 2018.
That’s one copy of the data. I also have an external USB hard drive that
I use for backing up my computer. As part of its backup process, that external hard drive will back up pictures folder with rusty .jpg. That’s a second copy, on a different device or medium. In addition to that external hard drive, I also have an online backup. The online backup can continuously scan or be scheduled on my computer and uploads my data off-site to a remote server. Rusty.jpg is included in this upload, and that becomes the third copy of your data. If your computer gets infected with ransomware virus, your computer disk drive and USB drive
will be encrypted as well. The remote online backup will not be affected.
Even if a hacker gets access to your computer, he will not be able to destroy
your online backup.