Apple

I read on Apple's website that some 3rd party mag-safe accessories may interfere with the cameras, and, I just got my phone, so I am definitely wanting to avoid something like that. I want to attach small SSDs to the back of my iPhone for recording video, so I've been looking for magnetic stickers. The sticker magnets on the major online retailers seem to only be for making cases able to let the iPhone charge with magsafe chargers while the case is on the phone. Anyone have experience doing such? Any good stickers or anything that would work for this?