diff --git a/geth/geth.md b/geth/geth.md
index aba15ed..ac8445e 100644
--- a/geth/geth.md
+++ b/geth/geth.md
@@ -21,7 +21,8 @@ docker-compose pull
 docker-compose up -d geth
 ```
 
-## Pruning
+## Pruning 
+Use it if the size is approaching 800 GB. At least 120 GB must be free for successful pruning.
 ```bash
 docker-compose down
 docker-compose up geth-pruning