Why am I not able to transfer music from my laptop to phone?

[salesguy426]

transferring music from laptop to phone

I have a HTC One phone and tried to transfer music from my laptop to phone and I get a message phone does not support this type of file .Where am I going wrong, please keep in mind I am not that savy . Thanks,

 

[Golfdriver97]

Re: transferring music from laptop to phone

Welcome to the forums. This message comes up on a pop up window on the PC?