Product info: 256 GB of external SDXC compatible devices, Class 10 speed,(based on SD 2.00 specification) Holds countless amounts of data, music, video,images etc. Compatibility: Mac OS, Windows,Android,Symbian . Package includes: 1 X TF SDXC micro SD memory card in blister package. 1X Free SD Adapter. (My Personal Device Test) PC HP=249.97GB,Cell Samsung A10e=250GB. Laptop HP=249GB. Please do not use Cheap Card Readers to Test !! most cards will not give you Full Capacity out the package. High Quality, can not be registered. Feel Free to ask questions before purchase!!!