Hi,
I want to use option 3 with my Zsun device, but I'm stuck on step 4 - Create .update directory on Zsun SMB/Windows Share (on Windows call it .update., don't ask why - it'll work) and copy SD100-openwrt.tar.gz (https://hackerspace.pl/~informatic/SD100-openwrt.tar.gz) there.
My Windows 10...