Storage Space: 16GB=approximately 14GB-15GB32GB=approximately 28GB-30GB64GB=approximately 56GB-60GB128GB=approximately 116GB-120GB Market Conversion 1GB = 1.00 Billion Bytes， Computer Conversion 1GB = 1.073741824 Billion Bytes Note: The market conversion for GB to Bytes slightly varies. Google "Memory Card Capacity"for more ing Method: The official factory default speed value is the ideal maximum value， the actual speed process and the use of the environment-related (such as the use of equipment， different configurations， different types of file storage speed is different， because the type of file， size， size Different and different)， so we can not guarantee the actual speed value! The speed show on our link is by Sandisk or by our professional instrument， you'd better use 3.0 interface and 3.0 card reader， then you can get a nice speed. Notice: 1. SANDISK official Store offers 100% products.2. All products are in compliance with the SANDISK official website.3. Manufacturer's reserve the right， at their sole discretion， to change or modify products. Appearance and pack design may change without prior notice.CZ73 USB3.0 flash driveMetal case with transfer speeds up to 150MB/s. Password protection for your files

CZ48 USB3.0 flash driveThe included SanDisk safe software， password protection technology can protect your files.Transmission speed up to 100MB/S.

CZ600 USB3.0 flash driveRetractable design to avoid damage without the use of capsIncluded SanDisk safe software