You mean Roms and Media I suppose
Everything:
* retroFe sits on the NAS
* All media and metadata is on the NAS
* All emulators and roms are on NAS
* Even PC games are installed on NAS
Everything works perfectly. retroFE behaves correctly and navigating the same installed build at two PCs at once doesn´t break anything in any of them. Emulators work as expected on all my tests, and even PC games can be played on LAN perfectly with just one installation folder. From my understanding, the only things that can be troublesome are:
* If too many computers access at the same time I suppose it will get slower (no problems on mine using two).
* If the emulator/game stores the saved files or temporary files on the emulator/game folder, obviously changes in one computer affect the other.
We have tested even emulators like dolphin with demanding games like F-Zero GX on two computers and the same time from the same folder on NAS, and it works perfectly.
Just try it for yourself