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Here are the best microSD cards for the Samsung Galaxy S9 & S9+

The Galaxy S9 and S9+ are only available to purchase with 64GB of built-in storage. For many, this just isn’t enough storage space, especially when you account for the size of 4K videos, photos, and music. Thankfully, owners can add up to 400GB of additional storage via a microSD card…

In case you missed it, here are some of the best cases, chargers, and accessories to go with your Galaxy S9 or S9+.

The most important thing to remember about purchasing any microSD card for your new smartphone is that it should be SDXC that has at least a U3 speed class rating.

Sandisk Ultra

If you’re looking for a microSD card that will let you add as much storage as possible, Sandisk offers one of the best 400GB cards on the market. You’ll have transfer speeds around 100MB a second which is perfect for all of your needs.

Purchase the Sandisk Ultra 400GB Micro SDXC UHS-I card for $200

Purchase the Sandisk Ultra 256GB Micro SDXC UHS-I card for $122

Purchase the Sandisk Ultra 200GB Micro SDXC UHS-I card for $69

Purchase the Sandisk Ultra 128GB Micro SDXC UHS-I card for $38

Samsung EVO Select

If you’re looking to expand the storage on your brand new Galaxy S9 or S9+ you don’t need to look much further than the company making the phone. Samsung’s EVO Select microSD cards are not only fast enough to transfer your data between the card and the phone, but also offer a variety of storage/price options.

Depending on the GB size of the card, you should get read speeds between 90MB and 95MB per second.

Purchase the Samsung EVO Select 128GB Class 3 microSDXC card for $40

Purchase the Samsung EVO Select 64GB Class 3 microSDXC card for $23

Purchase the Samsung EVO Select 256GB Class 3 microSDXC card for $150

SanDisk Extreme

The SanDisk Extreme series was made specifically to handle 4K video capture and to survive “challenging environmental conditions.” While the price of these cards can be slightly more expensive than the Samsung offerings above, they do come with a lifetime warranty if it ever stops functioning properly.

Purchase the SanDisk Extreme 64GB Class 3 microSDXC card for $33

Purchase the SanDisk Extreme 128GB Class 3 microSDXC card for $50

Purchase the SanDisk Extreme 32GB Class 3 microSDXC card for $19


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Avatar for Justin Duino Justin Duino

I’m a writer for 9to5Google with a background in IT and Android development. Follow me on Twitter to read my ramblings about tech and email me at justin@jaduino.com. Tips are always welcome.


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