A:Answer Hello, Please be informed that poor or slow speeds can be caused by: Host device port speed, Format and file system, Directory with lots of small files, Deeply nested directory etc. Please refer to the mentioned link to know the Common Causes of Slow External Performance: https://support-en.wd.com/app/answers/detailweb/a_id/17047/related/1 You may open a support ticket in brief at https://support-en.wd.com/app/askweb, the customer support team will contact you as soon as possible.