Question

Objects must be ___________ days old in current storage class before you can transition them to other.

Answer 1

The rule specifies the following actions: Two transition actions: Transition objects to the STANDARD_IA storage class 30 days after creation. Transition objects to the GLACIER storage class 90 days after creation.

Answer 2

30.

From the STANDARD storage classes to STANDARD_IA or ONEZONE_IA. The following constraints apply:  

For larger objects, there is a cost benefit for transitioning to STANDARD_IA or ONEZONE_IA. Amazon S3 does not transition objects that are smaller than 128 KB to the STANDARD_IA or ONEZONE_IA storage classes because it's not cost effective.  

Objects must be stored at least 30 days in the current storage class before you can transition them to STANDARD_IA or ONEZONE_IA. For example, you cannot create a lifecycle rule to transition objects to the STANDARD_IA storage class one day after you create them.  

Amazon S3 doesn't transition objects within the first 30 days because newer objects are often accessed more frequently or deleted sooner than is suitable for STANDARD_IA or ONEZONE_IA storage.  

If you are transitioning noncurrent objects (in versioned buckets), you can transition only objects that are at least 30 days noncurrent to STANDARD_IA or ONEZONE_IA storage.  

From the STANDARD_IA storage class to ONEZONE_IA. The following constraints apply:

Objects must be stored at least 30 days in the STANDARD_IA storage class before you can transition them to the ONEZONE_IA class.

https://docs.aws.amazon.com/AmazonS3/latest/dev/lifecycle-transition-general-considerations.html