gsbackup is a simple Python script that lets you incrementally upload a local directory to Google Storage.
To use gsbackup you need a Google Developer account with a project with a Google Storage bucket. You will also need a service account credential that has access to this bucket and the client id and secret for this account.
$ ./gsbackup.py
gsbackup.py --config FILE COMMAND
Commands:
--initial Create initial database by scanning source directory
--refresh Refresh database by scanning source directory
--upload Upload to Google Storage, abort with Ctrl-C
--list-not-uploaded List files that have not been uploaded