File Splitter/Merger (Dan picked generic name option #1 🎉)

Splitting

Note: We assume the file has a header row and we'll copy it to all output files, staying within assigned row limits.

Merging

Note: If "All Files Have A Header Row" is enabled then we assume a header row exists and that it is identical between the files. The header will be cut out of the files and placed once at the start of the output file.