diff --git a/docker-compose-generator/docker-fragments/opt-save-storage.yml b/docker-compose-generator/docker-fragments/opt-save-storage.yml
index 30e09b6..103a3e6 100644
--- a/docker-compose-generator/docker-fragments/opt-save-storage.yml
+++ b/docker-compose-generator/docker-fragments/opt-save-storage.yml
@@ -3,4 +3,6 @@ version: "3"
 services:
   bitcoind:
     environment:
+      # If you don't use Lightning Network, use opt-save-store-xxs instead
+      # This save about 1 years of block, your lightning node won't be able to see channel created 1 year since the time you start it.
       BITCOIN_EXTRA_ARGS: prune=100000
\ No newline at end of file