I suppose in the local storage. But what he did is pretty strange, why combine the VM storage with the ISO images, backups, etc? Better to keep them separate, as Proxmox intended, since VM storage is usually the most important in Proxmox.

Sadly no, the best way to think of the machine once proxmox is installed is as a node that youre accessing your resources from. There are somethings you can do from the cli on the machine.

@@NextStepSolutions.solved which means it's more suitable on server machine than desktop pc/environment?

Correct, but its pretty lightweight so you dont need anything too beefy. Depending on what youre trying to do.

@@NextStepSolutions.solved thanks for your reply. This information is very useful and really helps me a lot, cheers bro.

@@NextStepSolutions.solved Some things you say? :)) You can do everything on cli that you can do on the web interface + much more! So if you are brave enough and cli experienced, you don't need that GUI at all. On the other hand, since Proxmox is Debian based, you can just install a browser on it and load the interface from the Proxmox machine itself. It's not the easiest task, but it's perfectly possible.