When your computer is unable to connect to a backup destination, the CrashPlan app displays the message “Unable to back up - no connection for X days” for that destination. Additionally, you might receive an email alert notifying you that the computer “has been unable to reach any backup destinations for X Days”.
Follow the instructions in this article to troubleshoot the issue.
If you have multiple destinations, you can identify the destination with connection problems from the Backup tab of the CrashPlan app. Check the circle next to the destination's name:
This issue can occur for a number of reasons. Follow the instructions below in the order they are presented.
If re-authenticating with the destination did not resolve the issue, perform a standard uninstall and reinstall of the CrashPlan app. A standard uninstall does not affect your existing backups.
If the previous recommendations did not resolve your issue, follow the instructions below for the type of destination affected.
If you are unable to connect to a cloud destination (e.g., CrashPlan Central), please see our network troubleshooting article to identify and resolve the issue.
If you are unable to connect to a computer destination, refer to our guide on Connections Between Computers.