Description 1. High Speed and stable data transfer. 2. With 3-in-1 interface of USB3.0 & Micro usb & iOS system. 3. Allows you to conveniently store and carry photos, music and other files. 4. Hardware Requirement: Y-Disk sofaware (for IOS system device) 5. Solid State Storage,portable,metal rotation design can protect the connector well. 6. Due to the inner system and procedure data will occupy some space and the real capacity will reduce lightly. 7. Stylish lightweight; portable,new concept modeling,classic fashion,compact Brisk. 8. Operating system: iOS 8 or above/ME/2000/XP/ Vista/win7 /win8/win10, Mac OS 9.X/Linux2.4 or above. OTG-Functional SmartPhone(Android system 5.5+). 9. Write Speed:8/16/32GB-----7-17Mb/s , 64/128GB----10-20Mb/s. The rate of performance depends on the different operation system available and various flash adopted,so the speed maybe different. About Real Capacity Capacity flash memory products are usually shipped in accordance with 1MB = 1000KB, 1G = 1000MB computing, but the operating system using binary arithmetic 1MB = 1024KB, 1GB = 1024MB, so there are some differences between the display capacity and standard capacity memory products. 8GB = approximately 7.4GB-7.6GB 16GB = approximately 14GB-15GB 32GB = approximately 28GB-30GB 64GB = approximately 58GB-60GB 128GB = approximately 110GB-120GB This is calculation difference between manufacturer and your PC, please Google 'USB Flash Drive capacity' to get more information. Note: 1. Please download Y-Disk on App store for iPhone or iPad use. 2. It only compatible some Android Mobile which should has Micro usb port and OTG Function . 3. Choose the correct capacity for your lovely device,please make sure your device can support 128GB if you order 128GB.