diff --git a/Marlin/Configuration_adv.h b/Marlin/Configuration_adv.h
index 53b8cd98bb..ce838a4aec 100644
--- a/Marlin/Configuration_adv.h
+++ b/Marlin/Configuration_adv.h
@@ -2294,7 +2294,7 @@
 #if BOTH(SDSUPPORT, DIRECT_STEPPING)
   #define BLOCK_BUFFER_SIZE  8
 #elif ENABLED(SDSUPPORT)
-  #define BLOCK_BUFFER_SIZE 16
+  #define BLOCK_BUFFER_SIZE 8
 #else
   #define BLOCK_BUFFER_SIZE 16 // maximize block buffer
 #endif