Last year I bought the Nexto for a trip to Israel and did not regret. With a GH3 numerous time-lapse photography and documentary films were included. And I was often a whole day, with a heavy tripod, steady cam, various lenses and audio devices. It would have been a disaster if individual recordings had disappeared due to data loss. Therefore always immediately a backup was made on the Nexto of a full SD card spot. That worked without any problem, with the one-button operation can be even in the stress really make any mistakes. Without the Nexto I would have to carry a laptop, but my equipment was already at the limit of her weight and girth. For important photographs Backup is mandatory, the evening at the hotel was the "daily harvest" comfortably saved by Nexto to the laptop and another HDD. Without additional data verification of the Nexto battery enough for the dubbing of 2x32 GB SD card. As a storage medium I have a WD10JPVT 2.5 inch HDD from Western Digital 1TB built with that barely heats up and also in the proven "My Passport" will be used. The installation went smoothly. While it can be bought with the Nexto already installed HDD, but then you no longer have the choice of hard drive, here me maximum data security was important. With WD I have had good experiences here. Although SSD is shock resistant and faster when it is stored, but after searching the net I came to the conclusion that can be error-prone the technology of SSD yet, sudden data loss occurs repeatedly. They are also, of course, much more expensive than the proven 2.5-inch HDDs. There is now also a 2.5-inch HDD with 9.5mm height with 2TB (Samsung SpinPoint M9T; qid = 1404427655 & sr = 8-4 & keywords = Spinpoint + M9T), but I will only wait for long-term tests, because of data security. Presumably there will be teething problems, the temperature development could become critical, after all 3 data slices are crushed to 9.5 mm. (Was also recommended by the great Philip Bloom ...) I am very pleased with 1TB HDD with the Nexto ND 2730 and he has worked perfect, I forgive 5 Stars. Strong buy recommendation