PYBAG implements a portable bag and is intended for fast synchronization and backup. It lets you use a portable digital
storage device to carry your electronic documents similar to the way you can use a bag to carry paper documents.
You can synchronize the bag with your original files easily. If a synchronization conflict occurs, it will be reported. You
can specify rules for automatic conflict resolution.
With PYBAG, you can backup files and synchronize any changes made
to the original files with the bag. The synchronization process will only copy changed files.
The program is cross-platform and independent from the OS and file system. You may easily synchronize files between Windows and Linux, for example.
Symbolic links are supported on all systems (if the OS or file system does not support symlinks, then they are emulated).
This program has a GUI and a command line interface.
To quote README file: "For working you must create bag folder in you portable device and copy into bag file "pybag.py"" Whatever that means... I put it all in the Recycle bag.