OneDrive
What is OneDrive?
OneDrive for Business is a robust but simple-to-use cloud storage platform for small businesses, enterprises, and everything in between. Unlike other cloud storage providers, most of the advanced enterprise-focused features in OneDrive are available for every subscription type, enabling organizations to use OneDrive in whatever way benefits them the most.
Source: https://docs.microsoft.com/en-us/onedrive/one-drive-quickstart-small-business