10502EventSentryTrend analysis has determined unusual high disk usage on drive %1. The average recorded trend on drive %1 was %2 kb, the current trend was %3 kb, an increase of %4%%.
If this trend change is expected (for example, caused by a daily backup routine) then you will see this message two more times before the pattern is recognized. With the recorded trend, disk space will be exhausted in %5 days, with the current trend in %6 days.
This event is logged by EventSenty because Disk Space Monitoring has detected unusual disk activity, for example a large file being copied to a logical drive.
If you are receiving a lot of false alarms regarding the "Automatic Trend Detection" then you can easily disable or tweak this feature in the system health package.
You can configure this feature at "Packages -> System Health Packages -> Package Name -> Disk Space -> Limits".