Dear buyer, we are an honest seller. If there are any problems with the product, please contact us first. Do not give negative reviews casually, as we will help you solve the problem. Please understand, thank you!Regarding the brand issue, as these hard drives are recycled by us, we are unable to choose the brand. Meanwhile, we will conduct regular testing to ensure smooth operation.We cannot control the speed. Different brands have different speeds, which is why our prices are very cheap. It will be sent randomly, we cannot decide. If you have requirements for speed or brand, we may not be able to meet them as they are determined by price, but we will monitor the quality very well.Therefore, as an honest seller and merchant, I hope you are aware of relevant matters in advance. Although we cannot guarantee the brand and speed, we guarantee that the product can operate normally and meet your normal work needs!All hard drives undergo testing before departure, please feel free to use them. Regarding the brand, we will randomly send it.