diff --git a/.gitignore b/.gitignore
index 15d19a0..a82e296 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,4 +7,5 @@ _site
 vendor/bundle
 .DS_Store
 Gemfile.lock
-usb-butter*
\ No newline at end of file
+usb-butter*
+simulated-usb-butter/appstore/*
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..2ed43f6
--- /dev/null
+++ b/README.md
@@ -0,0 +1,15 @@
+# Butter Box UI
+
+Run locally:
+
+`bundle exec jekyll serve`
+
+## Dummy USB UI
+
+In addition to running the main UI locally, you can also simulate a USB drive having been inserted.  To do so, make a suitable directory tree available at `usb-butter` by running:
+
+`cp -r simulated-usb-butter usb-butter`
+
+Of course, this is just the UI layer, but it lets you work with the JS and CSS without needing a real box running.
+
+You can take this a step further and simulate an fdroid webdash content pack.  Use `fdroid-webdash-butter` with a sample app store or the wind-repo.  See `App Store.md`
\ No newline at end of file
diff --git a/simulated-usb-butter/index.html b/simulated-usb-butter/index.html
index 039c7bc..0d6e553 100644
--- a/simulated-usb-butter/index.html
+++ b/simulated-usb-butter/index.html
@@ -41,6 +41,12 @@ layout: empty
                     <td class="s">- &nbsp;</td>
                     <td class="t">Directory</td>
                 </tr>
+                <tr class="d">
+                    <td class="n"><a href="appstore/">appstore</a>/</td>
+                    <td class="m">2025-Feb-17 12:05:54</td>
+                    <td class="s">- &nbsp;</td>
+                    <td class="t">Directory</td>
+                </tr>
                 <tr class="d">
                     <td class="n"><a href="Learn/">Learn</a>/</td>
                     <td class="m">2024-Jun-12 14:58:54</td>