Best way to copy a database from one device to another is to use dropbox.
Is it possible to just transfer a single record?
If the data are very short (and not need to be secure), you can use
fmp: URL for embedding all data as script parameter, then send the URL in mail. (Of course, you need to pre-built a script to create record from the parameter)
Not with dropbox.
You can connect to a hosted database, or use sync a system such as Gozync from seedcode or create your own sync system.