diff --git a/cmd/imageproxy/main.go b/cmd/imageproxy/main.go
index 14fa7cc..ac7be3a 100644
--- a/cmd/imageproxy/main.go
+++ b/cmd/imageproxy/main.go
@@ -135,6 +135,9 @@ func diskCache(path string) *diskcache.Cache {
 	d := diskv.New(diskv.Options{
 		BasePath:     path,
 		CacheSizeMax: *cacheSize * 1024 * 1024,
+
+		// For file "c0ffee", store file as "c0/ff/c0ffee"
+		Transform: func(s string) []string { return []string{s[0:2], s[2:4]} },
 	})
 	return diskcache.NewWithDiskv(d)
 }