Problem with downloading music to my sony walkman

[lynstir]

Hi, I cannot download to my sony walkman from my computer. After following all instructions I get a cross next to any tracks and a remark that says 'cannot find certificate?'

Can anyone tell me what this means please.

[ClarkLong]

Hello 😃

can you give us the numer model of your device?

[lynstir]

Hi, The number is NWZ-B152

[paulasocks]

Hi. I have the same problem with my NWZ-B173. Please can anyone help. Thanks.

[cassanova1507]

ive got the same problem with my NWZ-B173. its so stupid