@ECHO OFF
ECHO Please make sure you copied all files to be combined 
ECHO into one directory or otherwise this operation will not
ECHO be completed. 
copy /b 150707~1.001+150707~1.002+150707~1.003+150707~1.004+150707~1.005+150707~1.006+150707~1.007+150707~1.008+150707~1.009+150707~1.010+150707~1.011+150707~1.012 150707~1.mp3