User Activity Monitor : Viewing User Activity : Managing the UAM Log : Local storage quota
  
Local storage quota
The UAM log on a managed computer depends upon the Local storage quota (%) setting of the DeviceLock Service on that computer. If the quota is exceeded, user activity monitoring rules cease to trigger and new records are not added to the log. A Local Storage Quota Exceeded event is logged in the Audit log with the following message: “User Activity Monitor rules are disabled due to insufficient space for local storage directory (%SHADOW_PATH%)”.
If the quota is exceeded while recording user activity, recording stops and the recorded files are saved to the local UAM log. This ensures that the completed portion of the recording is not lost.
When the quota is exceeded, the DeviceLock Service suspends monitoring of user activity until space is freed in the local data storage (for example, by sending logs to the DeviceLock Enterprise Server). Monitoring automatically resumes as soon as there is enough free space in the local data storage.