(OLD MODEL) LaCie Rugged 500 GB USB 3.0 Mini Disk Portable Hard Drive 301555 Shock, drops up to 4 feet, dust and water resistant for all-terrain use For Mac compatibility this Hard Drive requires reformatting. Refer to Application Guide for more details. Password protection built in Uses USB 3.0 which is up to 4 times faster than USB 2.0 (USB 2.0 compatible)