Regarding the issue of brand, as these hard drives are recycled by us, it is not possible to select the brand. Meanwhile, we will conduct regular testing to ensure smooth operation. Regarding speed, we have no control over it. Different brands have different speeds, which is why our prices are cheap. The speed range may be between 200-450MB/S, which will be randomly sent and we cannot decide. If you have requirements for speed or brand, we may not be able to meet them because it is determined by price, but we will monitor the quality well 1、Our hard drives are second-hand hard drives, It was removed from the New computer,and after our testing, they can all be installed and used normally. 2、Random brand shipping , Fully tested , rest assured to use, There will be varying degrees of usage marks on the appearance.Wholesale purchase prices are more favorable. 120GB=approx. 111GB 240GB=approx. 223G 480GB = approx. 446GB This is the difference in calculation between the manufacturer and your PC, please google "storage product capacity" for more information. PC defines 1GB = 1.073741824 billion bytes, while the market defines 1GB = 1.00 billion bytes Please do not use cheap card reader or data cable to test the speed will be reduced due to low quality card reader or data cable.