diff --git a/Mod-Data-Format.md b/Mod-Data-Format.md
index 4fcddc4..b519382 100644
--- a/Mod-Data-Format.md
+++ b/Mod-Data-Format.md
@@ -2,6 +2,13 @@ The Mod file format is a very simple command-based language which is very simila
 
 Each mod data file is stored in its own directory under `/static/data`.  The directory should be named using the Mod's slug name (see: [[About Slugs]]), and contain a file named `mod.cg` using the format described later on this page.
 
+Each mod should also have its own directory under `/static/browse`. This directory should contain:
+
+* a 160x160 `icon.png` file used to represent the mod in various places on the site
+* (optional) a `tutorials` directory.  See [[Tutorial Data Format]] for details.
+* a directory for each item (named using the item's slug).  Each directory should have a 48x48 
+    `icon.png` file for that item. See [[Mod Version Data Format]] for details.
+
 ## Example
 
 ```yaml
@@ -70,4 +77,4 @@ Each line of the file should usually contain a single command. Each command has
 
   Multiple versions may be specified, and if so, they should be listed with the most recent first.
 
-  For each version listed, a subdirectory should exist with exactly the same name containing a [[Mod Version Data Format]].
\ No newline at end of file
+  For each version listed, a subdirectory should exist under `/static/data/<mod_slug>/<version>` containing a `mod-version.cg` file. See [[Mod Version Data Format]] for details on this file's format.
\ No newline at end of file