The available capacity: 3.5GB-3.8GB, FAT32 is factory default drive format, which is read/write compatible with Windows and Mac OS; while NTFS is compatible with Windows but semi-compatible with Mac OS. Please format it properly if you need. Compatible with USB 2.0. Backwards compatible with USB 1.1.Supports Windows 10/8.1/8/7/Vista/XP/2000/ME/NT, Linux and Mac OS. A unique and Thought Gift Ideaeye-catching designs looks attractive and decorative. Sweet gift for your dear family, friends or wedding clients Durable perfomance: with a function of water-resistant, dustproof, prevent high temperature, magnetic resistance and shock-resistant, make the memory sticks become a perfect data. USB thumb drive requires no setup; you simply plug it into your laptop or desktop to access or store data. It can be used to store music, photos, designs, files, movies, documents, portable programs and just about any other type of data you might have. Easy to store and easy to carry.