@Magaki
ok comme ca c est clair
merci pour ta reponse

The problem was solved, just go to advanced settings and then to emulator settings and set the LIBRETRO SNES9X emulator as default, then configure so that each of these games runs on that core, within the game just go to the emulator option (hotkey + B) and configure controller 2 with multitap and have fun with 4 friends. ✌ ✌

@1sonic1

7.2.2 reloaded

Lo sentimos, pero solo admitimos la última versión oficial, por lo que debe instalar la última versión si desea asistencia.

También le metí las BIOS si era eso y no a funcionado

De acuerdo con la documentación, no se requiere BIOS, asegúrese de estar utilizando los formatos de archivo correctos:
https://wiki.recalbox.com/en/emulators/consoles/32x/libretro-picodrive

Y prueba con un ROMSET NO-INTRO, que es el más recomendable para esta consola, como puedes ver aquí:
https://wiki.recalbox.com/en/tutorials/games/generalities/isos-and-roms/romsets-for-recalbox

Si no funciona, como dije, debe usar la última versión oficial para que podamos intentar ayudarlo.

@sizzle718

So i added the entire PSX BIOS in RECALBOX/share/bios and it's still says im missing them when i do BIOS checker

So the first thing you need to fix is ​​this unrecognized BIOS problem. If the checker says that the BIOS is not required, something is wrong and needs to be resolved, this cannot be ignored.
You need to check what the problem is for not being recognized, you don't have "green thumbs", but you have "red thumbs" or "yellow thumbs" in the internal BIOS checker?
If you put the right BIOS in the wrong folder, it will not be recognized. If you put in the right BIOS, with the wrong name or extension spelled, it won't be recognized (and it's case sensitive in both name and extension).
If you enter the wrong BIOS, with the correct name and extension, you will get a "yellow thumb" but it won't work. How does the system know which BIOS is correct? It checks the name, extension, and MD5 (MD5 is like the fingerprint of a file), you need to have the correct file, with the correct name and extension, in the correct place.
See if this helps:
https://wiki.recalbox.com/en/basic-usage/features/bios-manager

"Network error: There's a problem accessing /Recalbox/share" when attempting to to transfer to USB or the most popular "an expected error is keeping you from copying the folder" Error 0x8007045D the request could not be performed because nof an IO device error,when trying to transfer to SD.

This is a Windows issue you should try to solve, but it's not a Recalbox issue and I can't fully support you on this, I recommend you do some research.
What I can help you with: First, make sure you have defined your network as public and with that you allow the transfer between computers on the same network, sometimes something so banal affects it totally...
Another possibility is to ensure that you have your operating system up to date, do this check and update as needed, test after updating.
Also, see if this solution still works:
https://forum.recalbox.com/topic/12089/not-access-to-my-recalbox-share-folder-on-mi-pc/7?_=1641298099889

And finally, have you searched on youtube for "how to fix 0x8007045D" ? I'm sure you'll find several correction possibilities, and I recommend that you try at least a few.

and when you say transfer directly to USB, your referring to the USB flash that you can insert an SD into directly right? i would have to get that if so, i only have the SD Micro SD adapter that slides into laptop.

If you plug the micro SD card directly into the notebook, it's not a problem, a USB adapter is usually needed, but if you don't, it's even easier.
It's possible to do this direct transfer, if you can't, it's because you've got another Windows bug, where for some reason Windows doesn't randomly associate a letter to a partition, if that's the case, see this post:
https://forum.recalbox.com/topic/22741/transferring-roms-directly-to-microsd-card-it-works

Neo Geo CD won't work neither, But works on Retropie

It could be a BIOS issue, or it could be ROMSET, fix the BIOS issue first and then if it doesn't work then we check what it is.

About the other problems, sorry, but it's no use attacking several problems at the same time, we'll solve them one at a time, otherwise we'll get lost in the process, it'll just confuse rather than help.