Why am I recommended to use a fast SD card when taking many pictures with my Xperia XA1 Ultra?
When you take many pictures by pressing the hardware camera key on your Xperia™ XA1 Ultra, you may get a notification recommending you to use a class 10 or faster SD card. This is by design and the reason is that a fast SD card is needed because of the size of the high resolution pictures taken by your camera.