Let’s check out the open-source equivalents to Google Drive, the company’s cloud storage product. Thankfully, the feature gap between Google Drive and the alternatives isn’t massive — all of them have clients for desktop and mobile, easy file sharing, and other features. Depending on what hardware you have on hand, these options might not even cost you anything.
NextCloud: NextCloud is widely regarded as the golden standard for hosting your own cloud. It goes far beyond simply hosting files — there are plugins for adding a task manager, a calendar, collaborative document editing (akin to Google Docs), video conferencing tools, notes, and much more. While the Android app only supports manging files, there are some Android clients for NextCloud plugins.
[Source: Android Police]