Update install_cfw.md

add community tip

hacks/install_cfw.md

@@ -76,7 +76,7 @@ Remove the "run.sh" file from the microSD card.
 
 ## Community Tips
 
-1. Use microSD cards smaller than 1GB such as 512MB and overwrite the same cards to minimize variations.
+1. Use microSD cards smaller than 1 GB such as 512 MB and overwrite the same cards to minimize variations. Formatting only the first 512 MB has also worked for some people.
 2. If the bootloader step is not working, double check the microSD card again for files or folders created by the stock firmware. (Sometimes if your timing is off with the setup press the camera will create a time stamp related folder that needs to be deleted before trying again).
 3. Make a note of the MAC for the camera and if possible set up DHCP to assign a specific IP address that can be monitored visually in DHCP logs.
 4. Start with fewer entries in your wpa_supplicant.conf to isolate WiFi issues.