Hey guys so I received my Samsung 64gb class 10 micro sd card yesterday. It says on the package that the read speed is up to 70mb/s and write speed is up to 20mb/s. I tried to use sd tools app but it says error writing buffer. So I used the ututu app to read it. First go it showed read:40mb/s and write:15+mb/s (cant exactly remember) I used that h2w... software top teddy for fake and it gave a good reading and it didn't say the cats was defective. The ututut app gives me a reading of:30mb/s and write:13mb/s. I have put 44 songs on it and did format it after I ran the h2... software so it would show blank. But the reason I bought the Samsung micro sd was because it's speed. Do you his think this is right? Or what should I do? I'm not too good with computers in terms of knowing about memory cards. P.s. It does show the total memory available to be at 58.56gb. Please help! Thanks