SPECIFICATIONSBrand Name: JASTERCapacity: 128GB 64GB 32GB 16GB 8GB 4GBCertification: CEChoice: yesColor: Black,Brown,PinkEncryption: NoFeatures: Pretty,Beautiful,CartoonFunction: Laptop Computer Car TVGift: Wedding gift,Gifts for children,Creative gift,Business gift,Photography Studio gift,Free key chain,Christmas gifts,Halloween giftHigh-concerned chemical: NoneInterface: USB 2.0 flash drivesInterface Type: USB 2.0Material: Silicone,SiliconeModel Number: USB StickOperating System: Win98/ME/2000/XP/ Vista/win7 /win8/win10,Mac OS 9.X/LOrigin: Mainland ChinaPackage: YesPlace of origin: Guangdong, China (Mainland)Product Type: Flash Disk,Normal,CreativeShape: Minisemi_Choice: yes FEATURE: * Reading speed: 10MB-18MB/second * Writing speed: 5MB-8MB/second * Plug and play, no need to install any software * Extra storage space for your Android device * USB interface has higher speed and higher stability * Lightweight, high-quality metal protection connector * Solid state storage, shockproof, anti-electromagnetic * USB service voltage: 4.5V-5.5V * Storage life: more than 5 years * Using A-grade chip, it can be erased repeatedly 1,000,000 times * Operating system: Win98/ME/2000/XP/Vista/win7/win8, Mac OS 9.X/Linux2.4 or later * USB connection: supports hot swap. * Put the digital world in your pocket * Speed varies depending on the type of file being transferred and computer configuration. ABOUT CAPACITY: 128MB=approximately 110MB-120MB 4GB = approximately 3.6GB-3.9GB 8GB = approximately 7.4GB-7.8GB 16GB = approximately 14.2GB-15GB 32GB = approximately 28GB-30GB 64GB = approximately 58GB-60GB 128GB = approximately 110GB-120GB This is a calculated difference between the manufacturer and your PC, please google"memory card capacity"for more information. Your PC says 1GB = 1073741824 million bytes, where the market defines 1 GB = 1 billion bytes. Therefore, there is a certain difference between the display capacity and the nominal capacity of flash memory products.