What kind of magic the letter a on the cards? Which is better, no letters, letter A1 or A2 ? Sort of found info, that A2 is better than A1, but found it better when the letters at all. Who knows? Talking about SanDisk Extreme Pro MicroSDXC UHS-I U3 A2 V30 64GB
Trying to rent a very fast card as it is already pulled out at ...