GALAXY Note 4 MicroSD card feature.

How fast can Note 4 read/write a microSDcard as a Sandisk Extreme Pro 64 GB 95 speed class 3. Heard online forums that this device can read only 30. Called Samsung, they do not have a published speed that the Note 4 can read/write microSD card. Considering Sandisk Extreme Pro 64 GB 95 for 4K video recording

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