The cardreader arrived with some weird chalk-like gunk stuck in the spring mechanism, which made putting games in sound and feel horrible, wasn't able to test if it even worked unfortunately. Trying to clean the internals is also terribly difficult if not impossible, and an alcohol bath didn't help either. Unfortunately I missed my return window, so that's on me. You're probably going to have more luck than I do, I'm sure they're not all that dirty.