How to Choose the Right SD Card for the Sony a6400
A memory card might not be recognized if the card does not connect properly with the memory card slot in your camera. Any of the following error messages may be displayed on the camera LCD screen when the memory card is not recognized.
Inserting Memory Cards - index.html
The camera is equipped with two memory card slots: a slot that takes one CFexpress or XQD memory card (q) and another that takes one SD memory card (w), for a total of two cards, one of each type.
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With 8GB flash storage, 1GB system 20 Android Lollipop operating system and memory and microSD memory card slot (card per month 1.2GHz Qualcomm quad-core processor.