OldMike65 said:
No idea what you mean by "compression" Macrium Reflect is a good image making program to make a exact image of your existing OS. 1st step is to install Macrium Reflect on your Hard drive, then once installed, you should make a rescue disk from Macrium Reflects main menu, under other options. This can be put on a USB or DVD drive. Macrium will make either option to be bootable. You can run Macrium to make your system image from your Hard drive or the rescue disk, your choice.

Macrium has nothing to do with your license for Windows 10, what so ever. Its a Backup program!!!
Hi Again,
I got my answer trying to do my full image on a 16GB usb stick run out with not enough disk space (meaning that macrium don't compress that much data). I will do my image on a external hard drive. Thanks