Monster Digital USBOT-0064-A 64GB USB 3.0 Super Speed OTG Flash Drive 64GB USB and Micro USB 3.0 Flash Drive, USB 3.0 OTG/ USB 2.0 Compatible, FAT File System for Windows and MAC Compatibility Advanced Error Correction to Ensure Data Integrity, Retractable Connectors Protects Contacts when Not in Use Static and Dynamic Wear Leveling - Adds to the Life of the Drive Easy Smartphone backup and File Transfer, The Advanced 3.0 USB has up to 80MB/s speed that lets you quickly and easily transfer all of your documents, HD movies, hi-res photos and more Monsterous Guarantee: Limited Lifetime Warranty