Windows 11 external drive backup

How do you set up more than one external drive to backup your C drive?

"More than one external drive"?

To each external drive in separate operations?

Or to one and then copy that to another?

Using imaging or not?

What software do you have in mind?

I save my drive images to a 2 bay NAS Box with 2 mirrored (Raid 1) drives, so the 2 drives is automatic.

It is difficult to answer your question without more info. Do you do full images, differential or incremental? Is your data on your system drive? Do you leave your backup drives connected all the time? What imaging app? Dependent on the answers to these questions possibly using a secondary backup app is the answer to your question. Someone suggested copying images as a solution to your question. I strongly suggest you do not.

I can only speak for the way I do my own imaging.

First of all, I do only full images, my backup plan is NOT automated, and I do NOT leave my backup drives connected all the time. This is to insure that my images will not be affected or corrupted if my computer if ever hacked or infected. I only connect my external drive when I want to create a new image and I alternate connecting 2 different external drives. While my primary imaging app is Macrium, about every third image I create I use my secondary imaging app, Hasleo. This way I am not putting all my eggs in one basket.

Secondly, my data is separate from my system and is imaged separately.

Thirdly, about every 6 months, I backup just my data to a drive that is kept in a big safe located in another building on the property.

And lastly, I do not keep any sensitive files on my computer. Anything of that nature is in my safety deposit box.

I have two 4TB USB drives for air-gap backup. Every two weeks I connect one of them and run a script that does a backup of all my logical disks on my system. I use Acronis True Image for one of the external drive backups, and I do file-by-file backup with Beyond Compare for the other external drive backup. This gives me two different file types in case one backup file or drive develops an error of some kind.

Those backups are in addition to a dual-layer automatic backup on separate drives in my system, duplicate backups go to SSD and HDD drives. Another automated backup does a complete dump to my NAS. Finally, my critical data is backed up in a cloud account for some off-site backup.

Yes, I'm a little paranoid about losing data!