A simple C++ utility to split a large file into two parts (optionally to different drives) and merge them back together. Useful for moving large files between drives with limited space.

• Split a file into two parts, saving each part to a specified drive or directory.
• Merge two parts back into a single file.
• Progress display for both splitting and merging.
• Command-line interface with flexible options.

• C++17 compiler
• cxxopts (included header-only)

Use your preferred C++ compiler. Example with g++:

g++ splitter.cpp -I./include -o splitter

splitter.exe -s --mainfile=<file> --drive1=<drive> --drive2=<drive> --p1size=<size_in_gb>

• --mainfile : Path to the file you want to split.
• --drive1 : Drive letter or directory for the first part (e.g., D).
• --drive2 : (Optional) Drive letter or directory for the second part. If omitted, part2 is saved in the current directory.
• --p1size : Size of the first part in GB.

Example:

splitter.exe -s --mainfile=bigfile.bin --drive1=D --drive2=E --p1size=3.5

splitter.exe -m --file1=<part1_path> --file2=<part2_path>

• --file1 : Path to the first part (output file, will be appended to).
• --file2 : Path to the second part (input file).

Example:

splitter.exe -m --file1=D:/part1.bin --file2=E:/part2.bin

splitter.exe --help

• The program creates files named part1.bin and part2.bin in the specified directories.
• Make sure you have enough free space on the target drives.
• The merge operation appends part2.bin to part1.bin.

See cxxopts.hpp for third-party license.

Author:
Kaleab Nigusse

Contributions and issues are welcome!