Have used this card since November last year in a Samsung Galaxy Tab, ran a bench mark test from AnTuTu and the card Performed very poorly 10MB read and write 6MB. Then ran two different tests on a desktop computer and after writing 7MB of test data to the card, the test failed due to write errors (even after formatting and error checking). So tested with CrystalDiskMark same poor results Read 15.97 Write failed. Card bought as Komputerbay 32GB microSDHC Class 10 Class Card 32GB High-speed '' Micro SDHC with SD adapter Sold through: Midwest Enterprise Co., LLC You Should Really think twice about buying this card. I have a Class 6 16GB card from Lexar that out performs this card by far, running all the same test and cost a lot less.