@mitu IT worked, thanks again and sry for my sometimes dumb questions.
Have a great day.

Which ROM/game ? Perhaps the message is coming from the emulator itself. Please add some more info about your setup and error, as requested in https://retropie.org.uk/forum/topic/3/read-this-first.

@kev1049
There’s an app called PiHelper that I use. Shows temp, memory usage, does ssh, and let’s you open a terminal window on your phone

@Crush said in SD Card running out of space.:

One last question if i may, is there a way to do the opposite of expanding the SD card? IE: strip the unused space.

Yes - see pi-shrink, it's not included in RetroPie.

@machine_74 this is normal behavior. The only partion that a windows computer can access directly is the boot partition. The other Linux partion, windows doesn't understand what it is and assumes it needs to be formatted. Nothing is wrong with your card, just ignore/close out the format prompts.

@collcroc123 the systems don't appear in emulation station until you put ROMs the their folders

Not sure why it's booting you to the command line...

@blairmac The official Docs have sections about transferring ROMs to and from Retropie:

Transferring Roms Running ROMs from a USB drive (section Manual Mount -> Transfer the existing RetroPie file structure)

Most of this should also apply to your custom build if it is similar enough to the original Retropie, but that's as far as support goes here for custom builds.

@veganpete said in Retropie launching ROMS from SD card, instead of USB.:

My question is:
1- How do I delete the duplicate ROMS from the SD card?

a number of ways. the docs are typically for adding roms, but instead of adding you can use these methods to access the files, and then delete:
https://retropie.org.uk/docs/Transferring-Roms/#sftp
https://retropie.org.uk/docs/Transferring-Roms/#samba-shares
https://retropie.org.uk/docs/Transferring-Roms/#manually-copy-files-from-usb-stick

2- How do I point Retropie to launch ROMS from the USB stick?

https://retropie.org.uk/docs/Running-ROMs-from-a-USB-drive/

3- How do I prevent Retropie from trying to copy the ROMS back to th SD card again?

doing https://retropie.org.uk/docs/Running-ROMs-from-a-USB-drive/ will stop that happening.

You Guys are Awesome !!!!! Thank you very much !!!!

Nuke them? Heh, are you secretively running an underground 0day box lol. You can enable root and connect to the Pi trough your PC via an FTP browser such as FlashFXP, you can immediately browse trough all dirs remove files etc.

Thanks.

I do it that way for my media server, which also runs Win7 and the files are gone, but having never used a RaspPi before I just wanted to double check. :D