The rugged SanDisk Extreme Portable SSD delivers high-speed transfers with up to 550MB/s read speeds, making it perfect for saving and editing hi-res photos and videos. Its IP55 rating mean that it can stand up to rain, splashes, spills and dust. (1) With up to 1TB capacity, it's perfect for extensive photo shoots, taking your portfolio with you or backing up your work. Compact and designed to fit in the palm of your hand, the SanDisk Extreme Portable SSD works with both PC and Mac computers. (1) IEC 60529 IP55: Tested to withstand water flow (30 kPa) at 3 min.; limited dust contact does not interfere with operation. Must be clean and dry before use. 1GB = 1,000,000,000 bytes; 1TB=1,000,000,000,000 bytes. Actual user storage less. Based on internal testing; performance may be lower depending on drive capacity, host device, OS and application. 1MB=1,000,000 bytes.