What is TPM Storage Proxmox?

In Proxmox VE, TPM (Trusted Platform Module) means the virtualized TPM hardware (vTPM) that modern operating systems, especially Windows 11, require. It is not "storage" in the hard drive sense, but the vTPM state is saved as a special device on the VM's storage. That lets Proxmox emulate the security chip needed for BitLocker encryption and Windows 11 compliance without a physical TPM on the host server.

MrPlanB.com covers this in its guides on running Windows 11 on Proxmox. Configuring the TPM state storage is a required step when creating the VM, and it usually needs a UEFI BIOS and a dedicated "TPM State" drive added to the VM hardware. The drive keeps encryption keys and security credentials generated by the VM across reboots and migrations, so the hypervisor can run a secure, fully functional Windows environment.