diff --git a/proxmox/proxmox-windows-vm-free-disk-space.sh b/proxmox/proxmox-windows-vm-free-disk-space.sh
new file mode 100644
index 0000000..4148499
--- /dev/null
+++ b/proxmox/proxmox-windows-vm-free-disk-space.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# REF: https://forum.proxmox.com/threads/determining-free-disk-space-on-windows-vms.145730/#post-656958
+
+[ $(which jq |wc -l) -eq 0 ] && apt install -y jq
+
+# either one works
+#qm agent $1 get-fsinfo \
+# |jq '[.[] | select(.["total-bytes"]) | {total_gb: ((.["total-bytes"] / (1024 * 1024 * 1024)) | round), used_gb: ((.["used-bytes"] / (1024 * 1024 * 1024)) | round), free_gb: (((.["total-bytes"] - .["used-bytes"]) / (1024 * 1024 * 1024)) | round)}]'
+
+qm guest cmd $1 get-fsinfo \
+ |jq '[.[] | select(.["total-bytes"]) | {total_gb: ((.["total-bytes"] / (1024 * 1024 * 1024)) | round), used_gb: ((.["used-bytes"] / (1024 * 1024 * 1024)) | round), free_gb: (((.["total-bytes"] - .["used-bytes"]) / (1024 * 1024 * 1024)) | round)}]'
+
+date
+
+exit;
+