Error: no space left on device

Hi there,

I’ve been working on the cube the last few days with no problems. Today however I created a new notebook, try to read the cube from there (while having open my normal notebook) and then I started encountering an error telling me that there is no space left on device.
Screenshot 2020-05-02 at 19.45.08

I first tried shutting down all processes. Then I log out and in again but the kernel won’t start, neither Julia, Python or R. Can someone help me solve the problem? and tips to avoid it in the future?

Best,
Juan