SharePoint and OneDrive are places where you can store files and you should make use of both. They are more or less the same but with different purposes. In the background all is SharePoint technology. M365 uses SharePoint as a storage location for other apps within the ecosystem, eg Teams and Yammer. This video shows which one to use, when and why.
![](https://s2.save4k.ru/pic/FfNprLou0LQ/mqdefault.jpg)