Fast delivery. Pretty much your standard USB, although mine was only 28gb not 30gb and is super slow to upload files from PC... snail on Valium slow! About an hour to copy 12 series episodes? Non HD MKV/MP4 files from PC to USB ?? I had the 15gb before this (bought from high street electronic shop) and it was almost instant transfer. But have been using this one for over a month and no problems really except the speed of storing data and missing 2gb (when there isn't even 1gb of hardware files on the thing) I suspect cheap copy but it does the job and good for price.