S3 bucket contents cleanup over 365 day old

Delete expired object delete markers or incomplete multipart uploads : You can only select Delete incomplete multipart uploads but not Delete expired object delete markers, when Expire current versions of objects rule is selected.

Delete incomplete multipart uploads: This action will stop all incomplete multipart uploads, and the parts associated with the multipart upload will be deleted

Delete expired object delete markers: You cannot enable Delete expired object delete markers if you enable Expire current versions of objects. This action is not available when "Expire current versions of objects" is selected.

Expire current version of objects will add the delete marker and the current version of an object is retained as a noncurrent version. For non-versioned buckets, Amazon S3 permanently removes the object. Please refer Expiring objects documentation

So to conclude this, in your case, current version of object would be expired in 365 days through rule Expire current versions of objects but you would not want to keep non-current version of objects for another 365 days, so based on your requirement I'd suggest you to add days in the rule Permanently delete noncurrent versions of objects accordingly, like how many days you want to keep noncurrent version objects to stay there. If you want to keep noncurrent version for 1 day then enter day value as 1 for this rule.

Additional Reference:

• Uploading and copying objects using multipart upload

• Working with delete markers

Hope you find this helpful.

Comment here if you hav additional questions, happy to help.

Abhishek