Sciebo is a campus cloud for all universities in NRW and comparable to Dropbox/OneDrive, but your data is hosted on a secure server of the university.
As a employee of the RWTH or UKA you can have up to 500 GB for your personal (research) data which can be on your local device (via the sciebo-app) or in the sciebo-cloud simultaneously.
For a project you can get up to 2 TB on request (with some formalities).
Go to the LogIn webpage (register before and have a look into the documentation!)
For more details and further information visit the online documentation (in the RWTH-Wiki) or the helpcenter of sciebo.