Windows 10: Backup and Restore on multiple devcies

Hello everyone, Is the situation below fine legally and technically? Thank you in advance.I have several devices with the same model and preinstalled OEM Windows 10 Pro. I need to set up these devices with the same apps and user profiles, etc. I've came up with a method by using Backup and Restore mentioned here to set up massively. The detail is:- Setting up a master device- Backup the master device into a external storage- Recover other devices by restoring from the master data in the external storage.It works fine and I've confirmed information below:- Device ID: All same with the master-

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Free hard drive backup/restore program?

I am looking for a free (freeware) program that will back up and restore a hard drive. I'm looking to clone a few external hard drives. If the program will backup the used space instead of the whole drive this will be awesome! Thanks for any suggestions.

 

Free hard drive backup/restore program?

Obviously you're looking for something besides your Xp Pro utility that does this?

 

Restoring Windows 10 Image using Macrium Reflect


In addition to the above. Here's my suggestion in step by step.
I assume you have Macrium Installed in your current HD and already made a backup copy.

1. Connect your new HD via USB port and boot up.
2. Run Macrium, click on Restore tab then select the Backup Image that you made to restore
3. click on "select a different target disk" then select your new HD as destination
   
   
   
4. Proceed to restore then Shutdown and disconnect the old HD and replace with the new HD
5. Boot up with your new HD.