I send mp3 files through USB from PC to my mobile ZTE BLADE running Android 2.2.
The mobile can not play them and when I send them back to PC they also do not play on the PC, although before sending they play ok.
The length of the files remain the same in the transfer but all their tags disappear.
My mobile has no problem playing mp3 files which are already in his SD card from the past.
The SD card is formatted in FAT32 format and in the PC the memory is NTFS.