I have been using this exernal hard drive for over three months . This hard drive is of 1tb that is 1024gb. And for me it is enough nd for most of you guys it would be also a decent space to keep ur files I mean the digital file that you need to carry it with you. The reading space with 3.0 cable is tremendously good and the transfer rate believe me it is very very good . You wont find any kind of lags during the transfer . The thing I loved is that it doesnt need any external source of power that means you have the super portable storage device . The only thing it lags in the design and the build quality of the case . It is quite platicy that feels very cheap but overall the hard drive is quite impressive and Good for daily use.