Nexto 500GB Portable Backup Solution (ND2901) Supports cameras and camcorders from various manufacturers, in addition to supporting a variety of memory card formats, such as: Compact Flash (CF), SD, SDHC and SDXC 2 year USA warranty valid when purchased from an authorized North American dealer only High Speed USB 3.0 plus USB Host capability SYNC feature allows for secondary backup Its built-in internal battery makes the ND2901 an ideal companion for field backup. It can be powered by the included AC adapter, interface cables, AA battery holder or an external battery exFAT format; supports files greater than 4GB