@zing Ok, to answer the first reply about BIOS, it says some emulators don't have all the BIOS, but when i added them to BIOS for instance, the PSX said "at least one mandatory Bios is missing and the Rom will likely not run at all until required Bios files are put in expected folder", So i added the entire PSX BIOS in RECALBOX/share/bios and it's still says im missing them when i do BIOS checker

for the second reply regarding sharing over Network, i originally wanted to add Roms on the SD card (64 Gb Sandisk) because im essentially wasting 64 GB's to just use as a Boot up. and i know its prob better to use the USB and if i could Boot up from USB i would. But as far as sharing any Roms like Cd based over Network with any of the top 4 ways Network/Recalbox/share, WInSCP, Recalbox manager and Filezilla i get an error message either
"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.
i don't know, i do know it's a pretty common issue from just reading all the posts. 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.

Neo Geo CD won't work neither, But works on Retropie
also i can't pair my Switch pro controller (Bluetooth), it says paired, but doesn't actually pair to configure. only works when using Usb wire. that also works on Retropie as well, i just like Recalbox and prefer it.
it's nearly impossible finding some to play on Netplay, hardly anyone has 1.9.8 RA and even when it says i'm able to connect to them, i get a "didn't receive Header from client" error. don't mean to rant and give a slew of problems to answer,
these are just one of many issues iv'e encountered with Recalbox and i have done lots of research how to fix them and still can't.
other than that i'm loving the new updated 8.0 Electron image!

@scavy Trust me i tried both Emulators and nothing. i wish you were able to add other Emulators manually or update them through the RPI like Raspi Setup. i tried CHD roms also, i think it may just be my USB Flash (Sandisk Cruzer 64) not sure why it wouldn't work, just a theory. Someone did say they were able to play SEGA CD off an SD, but not USB. but when they switched USB it worked. so i don't know what to think anymore honestly.

@scavy Sega CD is my biggest issue, PSX works, only some Roms dont (NBA Live 99 etc), i've read so many posts pertaining to Sega CD not working. the problem is im using a USB flash and booting from a SD (mainly because im not able to transfer larger files like CD based games over my network/recalbox/share),
i tried everything!, WinSCP. FileZilla, Recalbox manager.
one person said he was able to play Sega CD off a SD card, but not on a USB (Sandisk), which i have also, but when he tried it on a different Flashdrive said it worked.

i tried transferring Bios to SD (Bios checker says i dont have the Bios when i do go figure) and CD based Emulators say before loading "at least one Bios is missing". but still load and play fine anyway, LoL. i don't get how an updated version of Recalbox wouldnt have the required Bios, which im sure it does and even if does or doesn't, it don't say its there when you look in the Bios checker (Sega CD etc).

Can you please tell me if there's something else to do for this known issue?. do i need to boot bios from USB? (which i doubt) i even put the bios on the USB too to no avail.
it's just very puzzling and perplexing..
all the Roms check out on MD5, all the cues and bins are correct format. i heard some CD based games don't work when there's two bin files.
i just dont know SMH, it's not a big deal, but i'd like to just be able to play some Sega CD on Recalbox minus the headache LOL.

i have RECALBOX 8.0(Electron) installed on Raspberry Pi 3.
i have all the BIOS, is there something else i can do??? or does CD based games just don't work anymore?
i tried the other Emulators as well (Duckstation & there's another one) and the games don't even load just brings me back to list.
i don't understand how it's a brand new version (12/21) and still has compatibility issues. if any can possibly help or add some insight it would be greatly appreciated!!!

(Also another known issue you can't load/share Roms through Network i have a 64GB SD card that's rendered useless and have to use a USB Flash if anyone knows a possible Fix for that please LMK!)