The Nintendo Switch uses microSD cards — here's what size you should buy, and how to install it

The only type of SD card that works on a Nintendo Switch is a microSD card, which is smaller than a normal SD card.
IGN

How to Transfer Screenshots from the Switch 1 Memory Card

Nintendo will repeatedly warn you that the Nintendo Switch 2 can only interface with MicroSD Express Cards, making the Nintendo Switch 2's MicroSDXC or SDHC cards incompatible, but this isn't 100% ...
Hosted on MSN

How to Choose the Right Memory Card for Your Nintendo Switch 2

Switch 2 requires microSD Express cards due to higher bandwidth requirements. Buy from reputable sources to avoid scams and ensure the cards meet the standards, but don't worry about "official" ...
TweakTown

Switch 2 only supports microSD Express memory cards, you'll likely need to upgrade

TL;DR: The Nintendo Switch 2 exclusively supports microSD Express cards, offering SSD-like speeds up to 985MB/sec, unlike the 104MB/sec of regular microSD cards. Regular microSD cards can only store ...