Summary: It is nice and compact, not bigger than my hand. It holds 4 times a much information as my larger hard drive. There is no power cord because it is powered by the usb port. This makes it easier to travel with and not have to worry about the different voltage in other countries. It was a good buy for the price.
Excerpt: Got the PC/Mac version and hate that I have to install software to write to it. I have some systems I use that don't allow installs and am not sure if this will be an issue. Also, it froze on big file copy on my Mac and wouldn't remount until I went to a PC and ran the disk repair on it. Fine after that but don't trust overwhelming it with multiple copy requests at the same time.
Excerpt: first time, it was ok, computer recognized it and transferred files. when i tried a second time to back up my files, i hear clicking sounds and the computer won't recognize it. past experience tells me that hard drivers that make clicking sounds are ready to go poof.
Summary: I can get this to work on my Samsung Tab 2 Android tablet, but not on Windows 7 or 8 computers. I've tried everything I know. I think it isn't intended for Windows computers - only Apple and Android operating systems. So I am being overly generous by giving it three stars. I cannot find anything useful on the Toshiba website - certainly no support. I have tried three times and nobody knows anything at all.