There are only two main Galaxy S10 storage options to choose from and 128GB isn’t enough for some people, while 512GB costs too much. Thankfully, you can easily add more storage with a microSD card. With that in mind, these are the best microSD cards for the Galaxy S10. We’ll explain the speeds, sizes, and what you need to know.

For just $31 you can quickly add another 128GB and double your storage, not to mention get better performance and tons of space.
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https://www.gottabemobile.com/best-galaxy-s10-microsd-cards/