Upgrading to the largest microSD card your device supports is a great way to avoid running out of space, but there are other benefits too. You can store more apps, media, and files locally without needing to rely on cloud services.
Not all high-capacity cards are created equal, of course. The internet is full of too-good-to-be-true listings promising massive storage at rock-bottom prices. Many of these fall short, either underperforming or outright failing. That’s why it’s important to look beyond just capacity. A good microSD card also needs to be reliable and fast enough for your device's demands.
Read and write speeds matter, especially if you're using your card for demanding tasks like burst photography or recording high-resolution video. The best microSD card for a camera isn’t necessarily the same as the best one for a tablet or console.
In this guide, we highlight top-performing, high-capacity microSD cards from trusted brands. Our picks balance size, speed, and durability. The goal is simple: help you find a high capacity card that won’t let you down when it matters.
The largest microSD cards of 2025 in full
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How to choose the largest microSD card that's right for you
Storage capacity
Large-capacity microSD cards are important for a range of tasks. For example, if you're working with 4K video or burst photography, faster, high-capacity cards can also boost performance. Having extra storage means you won’t have to constantly delete or move files to make room. It’s especially useful for travel or remote work, where internet access might be limited. Larger cards also make it easier to keep everything in one place, simplifying backups and file organization.
Durability
Because many high-capacity cards are built with durability in mind, you often get added protection against water, shock, and extreme temperatures. If that's important - for example, using one in a drone - check your chosen card is protected against the elements.
Read/write speeds
It's always worth checking read/write speeds on any storage device - whether it's the largest microSD you can find or the best portable SSDs. The higher the numbers, the faster data transfer will be. This is especially important if you're recording high-res footage or performing other data-heavy workloads. Less so if you're using the memory card in your Switch or mobile devices.
You'll see a lot of cards in this round-up are listed as UHS, which means Ultra High Speed. Check the number that follows to see which is fastest. UHS-II is faster than UHS-I, and UHS-III is faster than both other options. On the card itself, check the number inside the 'U' logo. See a 1, and that means it's rated for a minimum of 10MB/s, while a 3 means it's capable of at least 30MB/s. For videographers, there's also a Video Speed Class (denoted by a 'V' logo), which ranges from V6 (6MB/s minimum) to V90 (90MB/s minimum).
Trusted brands
You'll find no end of memory cards online that promise much and deliver little. We recommend using microSD cards from trusted brands. In our experience during testing, these include Samsung, Kingston, SP/Silicon Power, Teamgroup, Sandisk, WD, PNY, Lexar, Inland, Gigastone, Patriot, Transcend, Amazon Basics, and MicroCenter. We wouldn’t trust any others.
