It threw me off at first as well. There are advantages and disadvantages obviously. One big one would be security of your financial data. But I totally agree it's not intuitive of what you would expect. Maybe somewhere down the road this will change.

That console has some serious problems. The mod work isn't the issue. You have actual rust on the board. I'm guessing it was submerged in water at some point. The first picture you shared shows rust spots all over.

The downloads section credentials are separate from the order credentials. No data is shared between them. You need to make a downloads account.

Yeah. Probably should have started with, "I bought it pre-modded." Pretty solid chance that whoever did your mod work did something wrong. You should not be hearing the power running through your audio. Might want to open the console and take some pictures. Maybe give some indication of what these m...

I watched your video, which by the way might be more effective in landscape instead of portrait. I don't see anything. Keep in mind, the MegaSD does not produce video. The console does. What kind of artifacts are you referring to?

This sounds like the issue wither the MegaSG not loading the cart initially.

The way around this was Run Cartridge, goes to black screen.
Press reset on the MegaSG.
Then open the MegaSG menu and Run Cartridge again.
Usually the second time it would properly load the cart.

Yeah there is something really wrong there. That sound is exactly like the mains resonating through the audio channels. You say that your Everdrive doesn't do this? That's sort of weird since it also attaches audio to the same lines as the MegaSD. But it could be because you have a x3 and the x3 doe...

There are a few prototypes floating around currently. Kevtris made one as well and showed it off.

Does the noise stop at any point or does it continue the entire time?

When are you hearing this buzzing? During CD games, cart games, loading, in the menu? The more details the easier it is to try and figure out what is happening.