Disk Resize Proxmox

Hello,

Suddenly I noticed that I can no longer switch my Zigbee devices, then I tried to restart the VM. In the Proxmox console I saw that it was constantly restarting. (Autoreboot). So I added 1Gb to my HDD. (Resze Disk) and it works again …
Under HA Host I see that my system is 97% occupied. I even passed a 24/7 HDD in Proxmox. but i have no idea how to use this in ha. I even see them as “sdb”, how can I increase my storage space?