Lock code for Micro SD card

Memory Cards Mobile memory, professional cards and all other st
3

Thanks sorted that one. Now got a problem where only some of my music will transfer onto the disk. All files are WMA files. I’ve got about 150 tracks on there with plenty of room for more but any more files that I transfer over to the phone are corrupted and don’t play properly. Any suggestions? Somebody suggested converting some of these files from wma to mp3 but don’t know if that will work.