Files Go was originally designed to help users in India deal with limited storage and patchy network coverage, but has since also been launched in China and is available globally with about 10 million users.
The app leaked out in November and Google has been steadily updating it with new features, and testing them via a beta channel.
The app offers a snapshot of available storage space, tools to free up space, and a peer-to-peer feature that lets users share files or apps with friends who are nearby without needing the internet.
The nearby sharing feature now has its own tab called 'Share', which should make it easier to access.
Google also says connecting with other nearby users will be faster too, taking on average five seconds.
However, perhaps the handiest update is that file transfers themselves can be a lot faster. The app now automatically uses the fastest available channel to send files, so if 5GHz Wi-Fi Direct is available, it will use that.
Google says some users have been able to transfer files at 490Mbps, or about four times faster than the previous limit of 125Mbps. At this speed Google estimates users can send 100 "original quality photos" in less than five seconds.
The app now also uses WPA2 encryption to protect files being shared.
On the space-saving side, earlier this year Google updated the app to prompt users to delete photos once they'd been backed up to Google Photos.