The Kingstone MicroSDXC 64gb Class 10 Memory card is Very fast Memory card which I used since 4 month, I bought this Memory card from snapdeal in 1520/- Indian Rupees, I had brought this memory card for my Asus mobile. It works perfectly well in this mobile. I have done read and write from this memory card. did not find any issue. Happy with quality of product.
This Company give us Lifetime Manufacturer Warranty, I can record 4k video with this memory card there are no any issue with 4k video recording, this memory card is excellent for me, if you want to buy this memory card then just do it, I like this memory card.