Origin: Mainland China Interface Type: USB 2.0 Package: Yes Model Number: Memory Stick Product Type: Flash Disk Product Type: Normal Product Type: Multifunctional Product Type: Creative Material: Plastic Certification: CE Gift: Gifts Key Chain Memory Capacity: 4GB 8GB 16GB 32GB 64GB Operating System: Win98/ME/2000/XP/ Vista/win7 /win8/win10,Mac OS 9.X/Linux2.4 or above Function: Laptop Function: Computer Function: Car Function: TV Can I change the receiving address after placing an order? Note: The receiving address can be modified within 30 minutes after placing an order. After 30 minutes, the receiving address cannot be modified. About real capacity "4GB = approximately 3.6GB-3.9GB 8GB = approximately 7.4GB-7.8GB 16GB = approximately 14.2GB-15GB 32GB = approximately 28GB-30GB 64GB = approximately 58GB-60GB This is calculation difference between manufacturer and your PC, please Google 'Memory card capacity' to get more information. Your PC says 1GB = 1.073741824 Billion bytes where Market Defines 1 GB = 1.00 Billion bytes.The pursuit of the perfect person is not recommended to buy." Who do I need to talk to if I haven't received the package? Dear friend, You can leave a message to the seller in the buyer's conversation, and the seller will give you the correct reply within 24 hours. What about the quality defects of the goods received? Dear friend, You can leave a message to the seller in the buyer's conversation, provide the picture file of the product defect, and the seller will give you the correct reply within 24 hours. SPECIFICATION 1. USB connection,support Hot plug Play. 2. No external power supply . 3. Support different types of os. 4. Solid State Storage, Shock proof and electromagnetic proof. 5. Durable data storage. 6. Fast speed in write/read transfer. 7. Hardware Requirement: PC with USB connection,Notebook,MAC. 8.Capacity:4GB/8GB/16GB/32GB/64GB Features: ?USB flash drive design: Small and portable. ?Plug and play: No need drive/power supply only plug in. ?A-class chip: Can be erased repeatedly for 100,0000 times. ?Operating system: Windows 98 / ME / 2000 / XP / Vista / 7 / 8 / 10, Mac OS 9.X, Linux2.4 or above. ?Writing speed: 10 Mb/s - 20 Mb/s. The rate of performance depends on the different operation system available and various flash adopted, so the speed maybe different.