Brand Name: JASTER
Interface Type: TYPE-C
Package: Yes
Model Number: U Disk 3 IN 1
Product Type: Multifunctional
High-concerned chemical: None
Material: Plastic
Encryption: No
Certification: CE
Products Status: Stock
Feature: 3 in 1 otg flash drive for Android/PC
Capacity: 4GB 8GB 16GB 32GB 64GB 128GB
Support: Android/Type C/Windows
Colors: gold, silver, black, blue, red
function: Multifunctional pendrive
function3: usb flash drive
function4: otg memory stick

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