Bought this for my Nintendo Switch and the speed of transfer is as advertised. I dont feel the lag when playing games installed on the SD Card compared to a regular Kingston card. So worth the purchase.
Purchased both the 64gig and 128gig micro sd card for Samsung Galaxy S8 mobile phones. Works as expected with 100MB/sec read and 80 MB/sec writes. Do not need amy other brand as Samsung Evo cards are robust and genuine unlike alot of unbranded cards with deceiving storage capacities and longevity. Trust your purchase when buying through Amazon, it's genuine and savings are made when compared to retail prices.