How to access Blackberry playbook with Windows 8
I have used this and it works.
1. Turn wifi on your playbook
2. Swipe down from the top and access Storage & Sharing
3. In Storage & Sharing: The first section USB Connections - Tap" Automatically Detect"
Lower down "File Sharing"- ON
Enter password: Make sure you remember it. (I use 1234)
4. Next on the left side of the tablet, under 'Storage & Sharing" you have "Security" tap on it
5. In "Security" you have "Development Mode" Tap on it
6. In Development "Use Development Mode" Tap ON (Enter password I used 1234)
7. Plug your playbook into your computer using USB
8. You should be able to see your Playbook in the files/drivers.
9. You maybe asked to load the driver. I did. When done I was able to access my Playbook.
I hope it helps.