Porteus

I can see windows disk from porteus and was able to backup all that I needed, but I can't write anything on the disk? Is there a way to write on it?

Which is the Windows disk? sda*? nvme0p1n*?

Open terminal:

Mcabel,

You need to disable FastShutdown option in Windows before booting to Porteus since that option locks the drive from editing.

You can find that settings in Power options.