This post was done in partnership with Wirecutter. When readers choose to buy Wirecutter's independently chosen editorial picks, Wirecutter and Engadget may earn affiliate commission. After testing more than 20 new and updated microSD cards, we've found that the SanDisk MicroSDXC card for Nintendo Switch (128 GB) is the best for most phones, tablets, and, yes, Nintendo Switches, but there are several other cards that work fine. The hard part is finding a real one; the online marketplaces are flooded with counterfeits. The Switch card is fast, consistent, comes from a reputable company, has a picture of a mushroom on it, and works in anything that takes a microSDXC card, not just the Switch.
When readers choose to buy The Wirecutter's independently chosen editorial picks, it may earn affiliate commissions that support its work. If you use a camera or cards that support UHS-II speeds, we recommend the SanDisk Extreme Pro SD UHS-II Card USB-C Reader. The Kingston supports SD, microSD, CF, and Memory Stick cards, and it reliably transferred data at UHS-II speeds in our SD card tests. Note from The Wirecutter: When readers choose to buy our independently chosen editorial picks, we may earn affiliate commissions that support our work.
A new format for microSD cards is here and will deliver data-transfer speeds of up to 985 megabytes per second (MB/s), opening up new possibilities for mobile gaming, apps, and future Raspberry Pi-type development boards. In a nutshell, using PCIe and NMVe on external mobile cards enables the same speeds available on solid-state (SSD) storage drives on laptops and mobile devices. The faster transfer speeds could be a game changer for Android handsets, which depend on SD cards to make up for restricted built-in storage. The other category of hardware they could help is future Raspberry Pi and other bare-bones developer boards that rely on SD cards for the operating system and apps. "microSD Express gives the mobile industry a compelling new choice to equip mobile devices with removable SSDs," said Hiroyuki Sakamoto, SDA president, in a statement.
If you're looking to boost storage on your smartphone, Switch or other device, Amazon is offering some steep discounts on SanDisk's highest capacity microSD cards as part of its deal of the day. You can boost your storage by a whopping terabyte for just $140 instead of $230, for a savings of $90. The best deal, though, looks like the 512GB card, priced at just $56, down from $100 -- instantly giving your device a very large and relatively cheap storage upgrade. These cards offer top-notch performance for their category (UHS-1) with speeds up to 120MB/s thanks to SanDisk's propriety tech. That's as fast as you can get without spending far, far more on a UHS-II MicroSD card.