The ruggedized SanDisk Extreme Portable SSD delivers high-speed transfers with up to 550MB/s read speeds. This makes it perfect for saving and editing hi-res photos and videos. With an IP55 rating, it also stands up to rain, splashes, spills and dust. 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. IEC 60529 IP55: Tested to withstand water flow at 3 min.; limited dust contact does not interfere with operation. Must be clean and dry before use. Up to 2M on a concrete floor Shock-resistant and vibration-resistant , Non-Operating Temperature , Operating Temperature Password protection uses 128-bit AES encryption and is supported by Windows 10, Windows 8.1, Windows 7 and macOS High Sierra, Sierra or Mac OS X El Capitan