U no virus, why not put music on the speaker? Both are in MP3 format, and the microphone also supports the MP3 format.I take a u-formatted a megaphone can play music, this is why? In addition, if I do not format if there is no other way u??? Seek expert advice.
Then you can format the U disk again, it is estimated that the speaker does not support the original format on the U disk.
Is there too many songs in your U disk? No, some speakers can only recognize thirty or forty songs
You can't just look at the file format. You also need to pay attention to [file system] format,May your disk is NTFS, while the player only supports Fat32,I suggest you go and see the instructions of the player for more information
