USB 3.0. Yes this is time for usb 3.0 which provided you 100 times better data transfer speed than usb 2.0.
I purchased this usb drive 6 months back and believe me its working properly.Below are the reasons you can for it;
Performance/speed: Transfer speeds up to 100MB/s, write speeds lowerTransfer files up to ten times faster than standard USB 2.0 drives
Protect private files with SanDisk SecureAccess™ software. USB 3.0-enabled and USB 2.0-compatible.Guys just go for it. It is coming only for 540 rs when I bought.