JASTER Red Wood USB 3.0 Flash Drive Free Custom Logo Memory Stick 64GB Wooden Box Pendrive 32GB Photography Gift USB Stick 16GB Laser Engraving U Disk 8GB Beautiful External Storage 4GB Portable Storage Devices Carbonized Bamboo thumbdrive

JASTER 16 GB 32 GB 4 GB 64 GB 8 GB. About 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. 128GB approximately 110GB-120GB. 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. So there are some differences between display capacity and nominal capacity of flash memory products