Is There a Way to Get the Roms on to the Device?

i am curious, how do you get the roms on to the device? Do you o plug it in through a usb? Do you pull the s d carrd out, copied the files, or it was the was go move. But here's what i did. I took my roms and i put em on a, a private a, a drop lock box link for myself. And that's where i played two of my three kirby games this week. It's great. The all on aneses, or, scuse me, neste card in there if i want. I can have it on the main drive. I need rambat point is.