New Card 2.0 USB Flash Drive 04GB Pen Drives 64GB Bank Card Pattern 32GB Memory Stick Plastic U Disk 8GB Pendrive 16GB

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.

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.