Recovery disk

[Anto]

Hi,

 

I know, is well discussed, but I can't reach my goal, so sorry if I ask again...

I have a recovery disk of windows 10 on a USB 16GB. The data are about 9 GB, the other 9 Gb are empty space.

If I make a .BIN or .IMG backup, the image is sector by sector 16GB file.

So, i would create an ,ISO image of 9GB to save space.

 

I have followed this tutorial:

https://timothy-quinn.com/how-to-convert-a-bootable-usb-to-an-iso-file/

But in my recovery there isn't a etfsboot.com to use as boot to make it bootable...

 

What have I to do?

Thanks.

Edited October 3 by Anto
corrections