If you really need to max out the storage on your Switch, GoPro, or tablet, this massive 400GB microSD card is down to $100 on Amazon right now, a match for the best price we’ve ever seen. You’re still paying a premium per-gigabyte price compared to smaller cards, which is typical for bleeding edge flash storage tech. But if you own a lot of Switch games, or capture a lot of 4K footage, it might be worth it.