How to make Scheduler Report alarm when it reach Max file Number

In 800xA 6.0.3 RU1,Scheduler Export file is set Max files per file type is 200.How to generate the alarm to operator that the folder is going to be overwrite.I tested by created 10 files per folder but system does not generate alarm when it is overwriting the old files.Any work around for this?
What is the max number that we can set in the Directory