diff --git a/CLAUDE.md b/CLAUDE.md
index 56255b3..a6a8132 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -16,6 +16,10 @@ Authorization: PVEAPIToken=root@pam!claude=fefcffca-df6e-48de-8adf-7907cd2ea879
 
 SSH is available to all three nodes (42.38, 42.39, 42.40) without password from the development machine. Use `pvesh` over SSH for CLI-based management.
 
+## Proxmox Backup Server (PBS) Access
+
+Passwordless SSH to the PBS host at `192.168.42.30` (hostname `pbs`, this is VM 111). Use `proxmox-backup-manager` over SSH for datastore / verify-job / GC / prune management (the PVE API token does **not** apply to PBS on port 8007). The datastore is `data-store` at `/mnt/datastore` (ext4 on `/dev/sdb1`, 200 GB on syno-lvm).
+
 ## Cluster Topology
 
 - **3 identical nodes**: Intel i3-6100 (2C/4T), 16GB RAM each