The File - Concatenate files Task is able to merge one or more files.
Concatenate files > File filter > Location sub tab
This Task uses the file filter to find one or more files to merge. Optionally, a specific file can be used (File B)
Concatenate files > Concatenate settings sub tab
Optional File B
You use the file filter to merge one or more files. Optionally, another file can be added. Specify the full path here.
Destination file
Enter the full path where the merged file should be saved to
Overwrite settings
You can control what happens if the file already exists:
•Overwrite if existing - overwrites the existing file
•Append - merges the new file with the existing
•Don't overwrite - skips the current operation and lets the current file be