The Galaxy S8 offers 64GB of internal storage, which might be more than enough for some. But if your phone is close to capacity with all your music, video, or pictures, you should take advantage of Galaxy S8's expandable storage and grab a quality microSD card.

The biggest and best from Samsung

Samsung EVO Select 256GB

With read speeds of up to 100MB/s and write speeds of up to 90MB/s, this is the fastest card from Samsung that's also U3 classified which makes it perfect for 4K video. If the 256GB card is too much or too expensive there are smaller and cheaper options available, too.

$73 at Amazon

Extreme value

SanDisk Extreme 128GB

SanDisk's high-performance microSDHC UHS-I Card offers transfer speeds of up to 80MB/s and with its U3 rating, it is more than capable of handling 4K video. We'll highlight the 128GB card for just $46, but smaller storage sizes are available!

$46 at Amazon

An Elite choice

PNY U3 Pro Elite 128GB

PNY's U3 Pro Elite 128GB card offers plenty of storage and the speeds you need. Classified at U3, it is great for video, and it is capable of up to 95MB/s read and 90MB/s write. Given the pricing of the other PNY cards, this is your best value for sure.

$50 at Amazon

Samsung for less

Samsung EVO 128GB microSD

Samsung's EVO 128GB microSD card isn't the company's top offering, but it comes with decent speeds and a price tag to match. With up to 48MB/s read and write speeds and Class 10 or U1 classification, it can handle 1080p video without a problem. If you want a Samsung-branded card that doesn't break the bank, this is the one to go with.

$39 at Amazon

Last but not least

SanDisk Ultra 128GB microSD

SanDisk is a respected brand when it comes to memory cards and storage products, and cards like this show you why. The SanDisk Ultra 128GB is a Class 10 card that comes with a 10-year warranty and has quick transfer speeds (up to 80MB/s). If you want a bit more memory, you can get a 200GB card for just $63.

$40 at Amazon

Whether you're constantly deleting photos or apps to clear up space on your phone or want to load up your phone with your favorite media, there's no better time to buy a microSD card for your Galaxy S8. The absolute best card you should get is the Samsung EVO Select 256GB which is a great deal for just $73.

Update September 2018: Updated formatting and pricing. These are still your best options for the Galaxy S8.

Samsung Galaxy S8 and S8+

Main

This post may contain affiliate links. See our disclosure policy for more details.