There's a reason why some SD cards have a tiny switch on the side. It's actually there to help protect the data onboard, but it's not as foolproof as it seems.

Unfortunately, this also means you'll need a new SD Express card for the Switch 2. If you're not familiar with this particular type of card or why it matters, let's break it down.

The original Switch uses a UHS-I microSD card slot for storage expansion. Why have newer and faster versions of the standard—UHS-II, UHS-III, and SD Express—failed to achieve critical mass?

The Switch 2 requires newer, faster microSD Express cards—the old SD cards you used with the original Switch won't work. Here's why, and some advice on which Express card to buy.