DeviceLock Service : Managing DeviceLock Service for Windows : Service Options : Auditing & Shadowing : Local storage quota (%)
  
Local storage quota (%)
You can define a disk quota for cached data such as audit data, shadow copies, user activity monitor recordings, file and message content analysis data, and alert queue data.
In the Local Storage Quota field, specify the maximum percentage (from 5 to 100) of free disk space that can be allocated for cached data.
If the quota is not set (i.e. the Enable local storage quota parameter is disabled), the DeviceLock Service uses all available space on the disk specified in the Local storage directory parameter.
When the size of the folder set by the Local storage directory parameter exceeds the quota, the DeviceLock Service either starts deleting old data (if the Cleanup files older than (days) option is enabled) or stops data shadowing and content analysis (if the Cleanup files older than (days) option is disabled or there is nothing to delete). When the quota is exceeded, monitoring of user activity also suspends.