No idea how to use this based on: i'm an uninitiated fool about memcardpro

[Ghost-Mop]

was looking around for an easy program since i have what would potentially require a few hundred VMC's for my Gamecube (thanks GC-Loader!) and just a few for my PS1 (Thanks XStation) and for some reason my GC MemcardPro isn't auto-detecting gameid's to make new VMCs automatically but thats their issue, not yours, just wanting to provide a little background.

[bodgit]

If you've downloaded one of the binaries, you don't need Golang or GitHub desktop, it's completely self-contained, just extract it and run it.

It does need to run in a Terminal/Console, (it will give you an error stating as much if you just double-click it on Windows) so you need to open up cmd.exe on Windows, or Terminal.app on macOS etc.

Then just run it passing it the directory/drive which is usually where your SD card is mounted and a list of one or more raw memory card images. for example:

On Windows: memcardpro.exe split D:\ card1.mcd card2.mcd ...

On macOS: memcardpro split /Volumes/NO\ NAME card1.mcd card2.mcd ...

You can stage everything to a regular directory instead just to test it's working and then manually copy the files to your SD card.

[Ghost-Mop]

and with only like two extra tries, with your guidance i was able to split my first GCN raw card!
thanks for the extra clarification.