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Here's the action you can do, so you do not need to waste your money for the incomplete multipart uploads.
The action user should do is "Creating lifecycle rule" in the S3 console.
What you should do is select your S3 Bucket and you will see the menu like below:
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The final action you should do is click "Create rule"
Once you setup the above rule, your rule will be executed in 48 hours and its result will be like below:
