Does anyone know how to increase the disk size on Foundation Model?

For some reason, the network connectivity to the foundation model (via ssh localhost) doesn't work reliably. So my earlier attempts to mount my host computer's drive and get things done  doesn't work reliably either. Now I am stuck with the initial 8GB or so hard disk on the foundation model which is insufficient for any meaningful work.

Appreciate any help.

Thanks & Regards,
Anil