The DiskUsage Collector is not collecting data - when running the Collector manually it hangs on
"Pruning Data and Building Diskspace Summary"
and then gives the following error which can also be seen in the logs:
Run-time error '-2147220477 (80040403)
Execution failed. SQL was: EXEC RebuildDiskSpaceSummary
This is because the number of days that has been set for pruning diskspace statistics is set too high. Go to:
Home > Account Settings > Global Settings
and change the Prune Diskspace field to 5 days.
Leave the Prune Bandwidth field as default.