I don’t quite understand what USB is needed. I have 3 pieces in the kit, system, firmware and key. Do I need to remake an empty flash drive as in your first point?
I need to know three things:
- How many USB devices you have.
- What each of them contain.
- What steps and associated letter you have done using them.
As mentioned in step 4, PureBoot should show an option to “OEM Factory Reset / Re-Ownership”, but the photos you sent do not match up with that.
You only need two USB drives: PureOS 10.3, and the Librem Key. You only require a third USB drive if you followed or plan to follow any of the official methods.