Memory Stick USB High Speed 2.0 Pen Flash Drive 1/2/4/8/16/32/64/128 GB
4GB → 3.6-3.9GB. Let us help you find the most cost-effective solution! Our Promise Storage Capacity Notice Factory capacity uses decimal system (1GB=1000MB), while OS uses binary (1GB=1024MB). Actual usable space will be lower.