Coolxap the Chinese leaker which had leaked startscreen video in l630 reports sd cards above class 6 and (class 10 recommended) is required after wp 8.1 update to install apps. I think this is for faster operation.if it is true then i will have to dump my 16 gb class 4 sd card.
Link:http://wmpoweruser.com/you-may-need...d-for-wp8-1-and-some-bad-news-for-520-owners/
Link:http://wmpoweruser.com/you-may-need...d-for-wp8-1-and-some-bad-news-for-520-owners/