I use GSA Backup Manager to create backup files on the external devices when connected to my computer, this feature is why I love this product over the others.
With this you can easily select the important files for you, those files will be supervised, and will automatically be written to the backup system on change.
With all the possibilities that this manager offers, you are assured that everything is saved to your USB as a backup. Aside from the ease in restoring the files that the software provides, backups can also be loaded and browsed.
Scoop is without a doubt that I basically refer GSA Backup Manager, there really are certainly great professionals operating this provider plus considerably budget-friendly price -> $10.00 single purchase!
In my own experience throughout my life, I had tons of situations when my PC either crashed unrecoverably, or some of the hardware went bad and many times the software I was relying on to back my files up just failed me and didn't recover anything, so even the backups went bad but with this one I am very happy and it is yet to fail me, I had a power outage recently, after a lighting hit my house, frying half of my PC after some time trying to resolve the issue I was happy to see that this program was successful at recovering my files.
GSA Backup Manager is a tool that weapons you in creating regular support for the computer files and store them in their respective location such as external or local file system, some of its competitors have pretty much same features, but I must say that this particular program is a lot more stable and definitely more reliable when it comes to creating backups, and more importantly, using them to reroll back to stable state.
Sometimes some sinister programs may corrupt your system or some of your specific files, but GSA Backup Manager keep all your work safe from such threats so you can rest easy.
If I am to trust my files to a program for a back up, I will never use anything but this particular program, as other have been known to not work correctly, unlike this one - which works 100% of the time.