Yellow phlegm means that you are suffering from cold and flu or your upper respiratory tract is under the influence of some microbial infection. Dark yellow phlegm or thick yellow phlegm indicates an infection of lower respiratory tract or sinuses.
The new Media Transfer Protocol (MTP) enables you to manage content on any portable device with storage. 1  Details.
About MTP USB Devices MTP is used on some portable MP3 players, video players and cellphones to transfer or sync content to and from media applications. MTP mode enables you to sync content automatically without using the drag and drop method in Windows Explorer.