Where do you move the virtual sd to for Dolphin?

[AzureLunar]

I'm completely aware Dolphin on Retroarch is worse then the standalone but I prefer it. I'm trying to get the homebrew channel to work and I have no idea what location the virtual sd card should be in.

[Dgo]

Maybe here you can find what you are asking for:
Linux: ~/.dolphin-emu/Wii/sd.raw OR ~/.local/share/dolphin-emu/Wii/sd.raw
OS X: ~/Library/Application\ Support/Dolphin/Wii/sd.raw
Windows: "%userprofile%\Documents\Dolphin Emulator\Wii\sd.raw" (quotation marks are necessary when copying it to Command Prompt)