Monster Digital 64GB USB 3.0 High Speed OTG Advanced Series (USBOT-0064-S) Monsterous Guarantee: Limited Lifetime Warranty High-Speed USB 2.0 - Up to 14MB/static and Dynamic Wear Leveling for continuous high performance Windows and Mac Compatible Features monsterous Guarantee Limited Lifetime Warranty 64gb USB & micro USB 3.0 Flash Drive advanced Error correction to ensure Data Integrity Limited Lifetime Warranty - Details at www.monsterdigital.com/warranty