Hello agent8846,
We have not tested installing Crashplan on PR4100 device. I would suggest you to wait for someone who have tried doing it successfully.
Also, you can refer to the below GUIDE posted by one of our user:
Hello agent8846,
We have not tested installing Crashplan on PR4100 device. I would suggest you to wait for someone who have tried doing it successfully.
Also, you can refer to the below GUIDE posted by one of our user: