Need help with partitioning

[RomainMe]

Hello, I've recently re-created my proxmox setup (I'm kinda noob on this) following guides.
I've partioned my disk during the installation (ssd 500G) in order to have free space as VM storage.

How can I use this free space? I've look around and find that I should use fdisk but when I do it says that my drive is running...

Can someone please help? I can of course provide more informations if needed

 

[LnxBil]

Was was wrong with the default thin-LVM that lead you to create partitions?

 

[RomainMe]

I "blindly" follow a guide, and also it's what I would have done, it seemed logical with my actual knowledge.

 

[RomainMe]

Solved