A backup system is worthless unless you can retrieve your files with accuracy and ease.
I had my old computer backed up using Carbonite.com. When the files were transferred to my new computer, I was horrified to find that all of my genealogy files were missing.
I have always been extremely careful to back up my images and had these on two external hard drives. However, all that I backed up for my genealogy files was the information that I inputted onto my Genealogy program. These had to do specifically with my ancestors. However, ten years of other research was lost when I switched computers.
I simply went to Carbonite.com, put in my email address and password, told Carbonite that I wanted to download selected files and the program showed me a cloud image of my old hard drive. From there, all I had to do was select the specific files I wanted and down load these to my present computer. What a relief
There may be better backup programs and cheaper ones but, I do like Carbonite.com....