Utilize AWS Step Functions to manage S3 events triggered by user image uploads. Execute an AWS Lambda function to resize the images directly within the S3 bucket and replace the original files. Implement an S3 Lifecycle expiration policy to automatically delete all stored images after 6 months.

Employ Amazon EventBridge to handle S3 events generated by user image uploads. Utilize an AWS Lambda function to resize the images directly within the S3 bucket and replace the original files. Establish an S3 Lifecycle expiration policy to automatically delete all stored images after 6 months.

Leverage S3 Event Notifications to trigger an AWS Lambda function upon user image uploads. The Lambda function should resize the images directly within the S3 bucket and store the original files. Configure an S3 Lifecycle policy to transition all stored images to S3 Standard-Infrequent Access (S3 Standard-IA) after 6 months.

Incorporate Amazon Simple Queue Service (Amazon SQS) to manage S3 events from user image uploads. Execute an AWS Lambda function to resize the images and store the resized versions in an S3 bucket configured with S3 Standard-Infrequent Access (S3 Standard-IA). Set up an S3 Lifecycle policy to transition all stored images to S3 Glacier Deep Archive after 6 months.