diff --git a/Directories-and-Files.md b/Directories-and-Files.md
index fe11c6b..22361dc 100644
--- a/Directories-and-Files.md
+++ b/Directories-and-Files.md
@@ -4,6 +4,8 @@ When talking about file systems, many people would assume directories, list file
 
 ### Sample usage
 
+First, run ```weed filer -h``` to see an example ```filer.toml``` file. Copy it out and read it, create the data store if needed.
+
 Two ways to start a weed filer
 
 ```bash
@@ -74,9 +76,9 @@ Here is a comparison of different filer store options.
 
 1. "memory" : only for testing/example purpose.
 2. "leveldb": simple, single machine, fast, scalable, but no failover.
-3. "mysql"/"postgres": robust and common, fast enough for most cases, scalable.
-4. "cassandra": robust and common, fast, scalable.
-5. "redis": very fast, scalable with clustering, need to enable persistent storage, file listing is limited as one directory's sub file names are stored in one set of a key.
+3. "mysql"/"postgres": robust and well-understood, fast enough for most cases, scalable.
+4. "cassandra": robust and well-understood, fast, scalable.
+5. "redis": very fast, scalable with clustering, need to enable persistent storage, file listing is limited because one directory's sub file names are stored in one key~value entry.
 
 ### Extending Storage Options