Keep a copy somewhere safe: or email it to yourself.
- Install FygoOS from fygonas.com/download on the machine you'll keep using.
- In FygoOS, open System Settings → License → Add License and paste the key. You'll need a free Fygo account.
- The key activates on one device, so use your real NAS, not a test machine.
Last step. Once FygoOS shows the license as active, press the button so the board shows this key as claimed. Keys that aren't activated within 7 days may go back into the hunt.
Marked as activated. Enjoy the NAS.