Play MP3 from amazon does not work

Hi, downloaded albums that I buy from Amazon cannot be played in my V60. It’s always only “track not readable”. – If I load the files to a separate USB in which only Amazon albums are, it says from the beginning “no and not. Files” It’s MP3. – So it shouldn’t be a problem. – With other MP3 there are no problems – but vice versa I have no problems with the Amazon MP3 on other devices (MP3 player, PC, TV). Do you have that too? – Amazon tells me, some manufacturers are not compatible with the Amazon MP3 – on request what is different to the Amazon MP3, they told me that Amazon uses a partly rigid and partly variable bit rate of an average of 256 kb and thus apparently have some problems or adjustments to be made. But now I don’t know what you could do differently… Therefore all the albums that Amazon downloaded have: can you tell me something about your experiences?