diff --git a/Directories-and-Files.md b/Directories-and-Files.md
index 1890223..f6f318f 100644
--- a/Directories-and-Files.md
+++ b/Directories-and-Files.md
@@ -57,12 +57,15 @@ We can take the following steps to map a full file path to the actual data block
 #### Architecture
 
 For file reads:
+1. Filer lookup metadata from Filer Store, which can be Cassandra/Mysql/Postgres/Redis/LevelDB.
+2. Filer lookup the volume id locations if not in the cache.
+3. Filer read from volume servers and pass along to the read request.
 ![](FilerRead.png)
 
 For writes:
 1. Client stream files to Filer
 2. Filer uploads data to Weed Volume Servers, and break the large files into chunks.
-3. Filer writes the metadata and chunk information into Filer database.
+3. Filer writes the metadata and chunk information into Filer store.
 
 ## Filer Store