diff --git a/disk-gc-threat-response.prose.md b/disk-gc-threat-response.prose.md
index 82be7b6..616a7b0 100644
--- a/disk-gc-threat-response.prose.md
+++ b/disk-gc-threat-response.prose.md
@@ -228,6 +228,14 @@ call summary-reporter
   plan: plan
 ```
 
+## GC SCHEDULE (PBS datastore only)
+
+The PBS GC schedule `0 20 * * *` (20:00 UTC) applies **only** to the PBS datastore
+(`/tank/pbs-backup` on storepve), NOT to media volumes. Media volumes (/media/*) are
+report-only at all threat levels. The cron job runs `proxmox-backup-manager datastore
+prune --datastore storepve-datastore --keep-daily 35` which only affects the PBS
+datastore; it does not touch media volumes or any other filesystem.
+
 ## GC Strategies by Host Type
 
 ### Docker Hosts (kagentz 105, syslog-api 116, docker-vm 109, amdpve .15)