Google Drive now available as PWA for Windows 10 Mobile and Monument Browser
(All About Windows Phone)

With the caveat that it`s not in the Store in `packaged` form, the recoding by Google of their Drive cloud service as a PWA (Progressive Web Application) is notable, not least because it makes the service fully accessible to Microsoft`s Windows 10 Mobile OS, at least via Monument Browser (what do you mean, you don`t have this installed?!) See below for screenshots and thoughts.