Best microSD cards for Android 2024

A microSD card for your Android phone lets you easily move files, photos, and music from device to device without having to rely on steady Wi-Fi or costly data. An Android microSD card also lets you load your phone up with more apps, music, and movies, which is especially useful if your device doesn't come with a lot of internal storage.

While many of the best Android phones today have ditched microSD support, you'll still find this slot in many of the mid-range and entry-level models. All those tiny little numbers, symbols, and speeds inscribed on a microSD card can be confusing, but this list will help clear up which memory cards are the best for Android devices. Here's a good selection for you to choose from.

Expand your horizons with the best microSD cards for Android

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FAQ: What do all these classes mean in memory cards?

Raspberry Pi with MicroSD card slot

(Image credit: Andrew Myrick / Android Central)

There are many different specs used to classify microSD card speeds, and most cards have at least two of these classifications and the straight read/write speeds listed. So here's your cheat sheet to these formats and which ones are better than others:

  • Video Speed Class: Indicated by a stylized V followed by numbers from 6 to 90, this class is one of the newer classification systems and was developed specifically for shooting ultra-high-definition video. For example, V30 starts at 30MB/s write speed, V60 starts at 60MB/s write speed, and V90 starts at 90MB/s, but unless your phone shoots 8K video, you probably don't need a V90 card.
  • UHS Speed Class: Indicated by a 1, 2, or 3 inside a U, this class is still used on most cards today. U1 starts at 10MB/s write speed, U3 starts at 30MB/s write speed, and both are perfectly adequate for most Android phones.
  • Speed Class: Indicated by a number inside a C, the original classification system for SD cards. Class 10 was as high as this class went, with a 10MB/s write speed, and practically every card worth buying today is well beyond this speed at this point, so it's not as helpful an indicator of power/quality these days.
  • App Performance Class: Indicated by an A1 or A2 rating, the App Performance Class is a metric used to define whether an SD card is capable of storing apps. A1 is the first generation whereas A2 is the second generation, thus A2 is faster and better than A1.
  • SD Express: SD Express is the latest technology that promises SSD-grade speeds of just under 1GB/s. Samsung was the first to announce production of SD Express microSD cards, which should be available "later this year." SD Express cards can be identified with the 'EX' marking, and will come in varying speed classes with minimum read/write speeds of 150MB/s, 300MB/s, 450MB/s and 600MB/s. 

You may notice that all of these specs focus on write speed — that tends to be the lower of the two rates on an SD card — so if you see a card with a "transfer" speed of 100MB/s but only a U3 class, chances are that card has a read speed of 100MB/s and a write speed of 30MB/s.

For most users who just want to use a microSD to store app data, music, and movies for offline playback, you'll be perfectly fine with a U1 or U3 card like the Samsung EVO Select. However, if you're someone who intends to use a microSD card for shooting copious amounts of photos or 4K video, you might want to spring for a U3/V30 (30MB/s) or V60 card, such as the Lexar Professional 1000x.

The Samsung EVO Select 128GB microSD card is perfect for just about any Android device, be it a phone or the best Android tablet. You don't really need more than 128GB on average. As for the speed and other specs, Samsung's affordable memory card can store apps thanks to the A2 classification and it meets the V30 and U3 30MB/s write speeds. That's plenty of bang for your buck!

Check your Android device so you can buy the right microSD card for it

Gone are the days when pretty much every Android smartphone and tablet included a microSD card slot. While the best Android tablets like the Galaxy Tab S9 Ultra include a microSD card slot, the same can't be said for the best Android phones. So you'll need to make sure that your phone or tablet is an Android device with expandable storage first before picking up a microSD card. If you plan on storing apps on your memory card, make sure it has the A1 or A2 App Performance Class rating.

Just like everything else in a phone and tablet, manufacturers have to license specific software for certain microSD card formats to work in their devices, and that's why some phones like the Samsung Galaxy A54 5G can support up to a 1TB card. In contrast, other phones might only work with cards of up to a 128GB.

In most cases, you can stick a 256GB card in a phone only rated for 128GB and be fine, but we generally try to stick to the rated sizes when it comes to Android microSD cards so that if something goes wrong, support can't blame you for using too big of a card. And unless your phone specifically says it can take a 1TB card, don't waste your money on one, as capacities that high do need a phone rated to handle them.

Andrew Myrick
Senior Editor - Chromebooks and tablets

Andrew Myrick is a Senior Editor at Android Central. He enjoys everything to do with technology, including tablets, smartphones, and everything in between. Perhaps his favorite past-time is collecting different headphones, even if they all end up in the same drawer.

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