Companies say that to tell you which model of micro SD cards the phone supports which in this case the sdxc 64GB-2TB means that your phone can support micro sdxc cards see this article for more info https://kb.sandisk.com/app/answers/detail/a_id/2520/~/sd/sdhc/sdxc-specifications-and-compatibilityAnd my phone is rated to accommodate 'up to 2tb of expandable memory'
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