Check the format of downloaded music. Generally, mobile phones can only open mp3 format, but not others.

If this is not the problem, then it has something to do with the mobile phone. Some mobile phones can only open music and videos in the folders automatically created by the mobile phone on the msd card, not all the files on the card. Open, please check the mobile phone manual again.

As for the computer not being able to detect a mobile phone or a certain card reader, there are many reasons. This is all related to the mobile phone, msd card, data cable, card reader and USB port, so don’t worry too much. If you have a laptop at home and the laptop has a slot for directly inserting the SD card, most of the data can be read using that.