Nexto Di Digital Photo Storage ND2730 500gb Preview photo clips using the built-in 1.44" color LCD - a preview of both the internal HDD and the external device (CF, SD, SDHC, SDXC) are supported. Backup From Memory Cards: Download data from digital camera memory cards (CF, SD, SDHC, SDXC) 2 Year USA Warranty. Its built-in internal battery makes the ND2730 an ideal companion for field backup. It can be powered by the included AC adapter, interface cables, AA battery holder or an external battery Computer Interface USB 2.0: 480 MB/sIEEE 1394b (FireWire 800): 800 MB/s