It it actually possible to get XCOPY to append, as per
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/xcopy.mspx?mfr=true To append files, specify a single file for destination, but multiple files for source (that is, by using wildcards or file1+file2+file3 format).
?
Neither wildcards or file1+file2+file3 format works for me.
Workaround (sometimes): Use COPY instead.
If I get it right, you want to merge files into one. For text files I would use: