1.1 GB=1,000,000,000 bytes.Actual user storage less.This is an industry applicable standard across all memory storage products.
2.About speed:because it based on internal testing maybe will lower.
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Large Capacity — Carry 40,000 + high-quality photos or 7,000 + average videos.
Vivid Mixcolor — Make it easier to classify your files. More colors, more choices.
Plug and Play — Compatible with Windows / Linux / Mac OS. Needs no drive to be installed.
High Speed Transmission — Reading speed 25 MB/s; Writing speed 12 MB/s. Transfer 1000 photos in less than 5 min.
Lifetime Warranty — We will provide you with a refund or replacement if there is any quality defective of our usb flash drives.