I am working with files in binary access mode to edit ID3 tags. When appending the new tag to the end of the file, the "put" statement is adding 4 extra characters. In this order it adds[backspace][space][end of text][space] so that I end up with
[mp3 data][4 extra bytes][tag]

This works fine except that my file grows 4 bytes larger each time I do it. Is there a way to fix or avoid this?
Thanks to anyone willing to help!