Hi Zeynettin
The default retention in QRadar is 30 days
https://www.ibm.com/docs/en/qsip/7.5?topic=tasks-data-retention
You can use the following technote to calaculate the space usage in QRadar
https://www.ibm.com/support/pages/qradar-how-calculate-storage-used-events-and-flows-day-qradar-host
Thanks
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John Dawson
Qradar Support Architect
IBM
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