i bought on 30 Dec 2015. still working perfect.No lagging..no error Excellent and inexpensive storage device. Plug and play for one TB of storage space. Quick and responsive drive for all of your data and back up needs. The unit is slim, silent and very portable.Solid 1TB hard drive. Small enough to easily carry around all of your files in your backpack or purse. Personally, I prefer the value of the 2 TB version, despite it's added bulkiness, but the 1 TB functions well too. Just a reminder to back up all of your important files in multiple places! Hard drives can die, your files shouldn't die with them.