Thank you for posting query in Microsoft Q&A Platform.
Storage Event Trigger in Azure data factory currently supports only Azure Data Lake Storage Gen2 and General-purpose version 2 storage accounts.
For more details, refer to https://learn.microsoft.com/en-us/azure/data-factory/how-to-create-event-trigger
To deal with ADLS gen1 storage account: you may checkout the below Stackoverflow link which addressing similar issue.
Hope this will help. Thank you. Feel free to share if any further queries.
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