Adding a directory that is not located in default Box directory for backup

I have a folder that I do all my coding in C:\code and I want to add this directory to Box as a backup but do not want to move the coding folder into the default Box directory.  I thought Box Sync was the answer as it allows me to right click a directory and add to Box yet leave that directory where it is, but this seems to be deprecated for Box Drive.  I have reviewed the documentation on Drive with no luck and so here I am.  Anyone know a way to add C:\code to my Box drive without having to move it?