diff --git a/modules/storage/aws-backup/main.tf b/modules/storage/aws-backup/main.tf
index 0a6b982..d4cc5b0 100644
--- a/modules/storage/aws-backup/main.tf
+++ b/modules/storage/aws-backup/main.tf
@@ -128,7 +128,7 @@ resource "aws_backup_plan" "ab-plan" {
 
     lifecycle {
       delete_after = var.monthly-backup-retention
-      cold_storage_after = var.daily-backup-retention # move to cold storage after daily retention
+      cold_storage_after = var.daily-backup-retention # move to cold storage after daily retention, supported on a few services only
     }
 
     recovery_point_tags = {