9to5Google spotted the app in the Play Store, which was available briefly under Google's early-access program. The app is no longer available as the program is full.
Files Go in its current state is available for devices running Android 5.0 and above. The app serves several key functions, including working as a storage manager to organize files and free up space.
Last year Google tested a Play Store feature that suggested deleting infrequently used apps to create storage space. Files Go does this too, but will also help users spot and remove "spam & duplicate images".
Files Go also acts as a file manager, with search tools for finding important documents.
The app itself is only 10MB in size and judging by the app's screenshots it is aimed at users with limited storage.
An image of the Storage tab shows a device with 8GB of internal storage and displays how much capacity has been used. This tab has a "clean cache" button that removes the app cache and displays how much data can be removed.
In a panel below it lists stored chat app media, such as pictures, that can be removed.
The Files tab features the file-transfer tool that allows users to share images, videos, and audio with friends in Bluetooth range. To send a file, the user needs to ask the friend to open the app and tap on a Receive button. The app lists nearby contacts.
A third screen shows a window that can be used to view all files or filter them by source, such as chat app or camera.
There are no details about when the app will be released. The page notes that the unreleased app may be unstable.