S3 Standard-IA storage has a minimum billable object size of 128 KB. Smaller objects may be stored but will be charged for 128 KB of storage at the appropriate storage class rate. S3 Standard-IA storage is charged for a minimum storage duration of 30 days, and objects deleted before 30 days incur a pro-rated charge equal to the storage charge for the remaining days. Objects that are deleted, overwritten, or transitioned to a different storage class before 30 days will incur the normal storage usage charge plus a pro-rated charge for the remainder of the 30-day minimum. Objects stored for 30 days or longer will not incur a 30-day minimum charge.
*** For each object that is stored in the S3 Glacier Flexible Retrieval and S3 Glacier Deep Archive storage classes, AceCloud charges for 40 KB of additional metadata for each archived object, with 8 KB charged at S3 Standard rates and 32 KB charged at S3 Glacier Flexible Retrieval or S3 Deep Archive rates. This allows you to get a real-time list of all of your S3 objects using the S3 LIST API or the S3 Inventory report. S3 Glacier Instant Retrieval has a minimum billable object size of 128 KB. Smaller objects may be stored but will be charged for 128 KB of storage at the appropriate storage class rate. Objects that are archived to S3 Glacier Instant Retrieval and S3 Glacier Flexible Retrieval are charged for a minimum storage duration of 90 days, and S3 Glacier Deep Archive has a minimum storage duration of 180 days. Objects deleted prior to the minimum storage duration incur a pro-rated charge equal to the storage charge for the remaining days. Objects that are deleted, overwritten, or transitioned to a different storage class before the minimum storage duration will incur the normal storage usage charge plus a pro-rated storage charge for the remainder of the minimum storage duration. Objects stored longer than the minimum storage duration will not incur a minimum storage charge.