First one was faulty, replacement worked ok but performance was a bit er attic still bit dissapointed because the other strontium products Nitro Plus UHS class 10 [3]SD card was great in my 4k camera these USB 3 Ammo sticks are not compatible with Sony Car Audio Head Units but are For JVC whilst these are faster not really necessary for car audio,See the Adata UV128 ones from 16 to 128 gig they work in all I have tested and are a lot faster to get the files onto than usb 2 which takes ages,and are a great low cost solution Brent
