diff --git a/homeassistant/components/nest/__init__.py b/homeassistant/components/nest/__init__.py
index 8a1719a9bd5..0f378fcc737 100644
--- a/homeassistant/components/nest/__init__.py
+++ b/homeassistant/components/nest/__init__.py
@@ -103,10 +103,10 @@ CONFIG_SCHEMA = vol.Schema(
 PLATFORMS = [Platform.CAMERA, Platform.CLIMATE, Platform.EVENT, Platform.SENSOR]
 
 # Fetch media events with a disk backed cache, with a limit for each camera
-# device. The largest media items are mp4 clips at ~120kb each, and we target
+# device. The largest media items are mp4 clips at ~450kb each, and we target
 # ~125MB of storage per camera to try to balance a reasonable user experience
 # for event history not not filling the disk.
-EVENT_MEDIA_CACHE_SIZE = 1024  # number of events
+EVENT_MEDIA_CACHE_SIZE = 256  # number of events
 
 THUMBNAIL_SIZE_PX = 175