@mitu @mitu
Sorry for the late reply, I didn't get notified for some reason.
I ended up using WinSCP, but I prefer it much less than the file share.
I'll try the registry fix and will report ASAP

@RetroJoe This is not a ROM sharing site, the rules are there so people understand that. You seem to have not read them - https://retropie.org.uk/forum/topic/2/forum-rules.

Freeware and demo image

That doesn't give re-distribution rights automatically. There's a topic dedicated to how to legally obtain games/ROMs, you may post there - respecting the forum rules - links to games you think are freeware/demo:

https://retropie.org.uk/forum/topic/10918/

If you're not blocking the port yourself, check with your ISP. RetroPie doesn't come with any firewall rules configured (unless you did so).

Are you running the most recent version of Windows 10? They removed all the homegroup stuff back in the spring. Smart move on their part since it would also cause issues with non windows shares.

In terms of pre-made gamelist files, it really only makes sense to do it for No-Intro sets. As those are kinda the standard.

Why not set up a file server on the pi3 and have the piZero read from that directory for the roms and game saves. That way it will all be stored on the pi3 for OTG fun. You can have the pi3 host its one access point from the on board wifi and have the piZero connect to it. You can also have the piZero temp download the rom and save the game locally and once the game closes you can have it automatically sync the game saves using something like rsync.

Hope that wasn't too confusing but that all works! :)

@BuZz ok friend, thank you

If it is implemented someday it would be gentle to alert the user about sensitive data (TBH I can only remember retroachievements account data, nothing more).