I have an NWZ-WH505 player, for 2 years or so. Sometimes I fill it with some lengthy music files, a few hours length. An amount of each of these files allows it to be uploaded on my player, but I noticed that if this file is longer than about 4 (or 4,5?) hours, then it has difficulties with uploading, and offers to transform a file into M4A format, and often it leads to shortening a file. Is it a specific of NWZ-WH505 or a technical problem, I'd like to know. Thank you for an answer.
