diff --git a/hardware/Building-an-Access-Point.md b/hardware/Building-an-Access-Point.md
index e03fbd8..eb3e62d 100644
--- a/hardware/Building-an-Access-Point.md
+++ b/hardware/Building-an-Access-Point.md
@@ -108,9 +108,35 @@ You can build and flash the file system by running
 pio run -e <environment> -t uploadfs
 ```
 
+**NB:** If you modify any of the files under .../ESP32_AP-Flasher/wwwroot you
+must run gzip_wwwfiles.py prior to uploading the filesystem to update
+the compressed versions of the files in the .../ESP32_AP-Flasher/data
+subdirectory.
+
+
+```
+skip@Dell-7040:~/esl/OpenEPaperLink/ESP32_AP-Flasher$ python gzip_wwwfiles.py
+Gzipping: upload-demo.html
+Gzipping: index.html
+Gzipping: edit.html
+Gzipping: ota.js
+Gzipping: favicon.ico
+Gzipping: flash.js
+Gzipping: setup.html
+Gzipping: main.js
+Gzipping: main.css
+Gzipping: setup.js
+Gzipping: painter.js
+Gzipping: variables-demo.html
+Gzipping: content_cards.json
+Gzipping: jsontemplate-demo.html
+skip@Dell-7040:~/esl/OpenEPaperLink/ESP32_AP-Flasher$
+```
+
+
 ### Flashing the Primary ESP32 firmware built from source
 
-You can build and flash the Primary ESP32 firmware by running
+You can build and flash the Primary ESP32 firmware by running 
 
 ```
 pio run -e <environment> -t upload
@@ -167,3 +193,4 @@ Saved PC:0x40022d86
 ...
 ```
 
+