AWS S3 One Zone-Infrequent Access

Amazon S3 One Zone-Infrequent Access (S3 One Zone-IA)
S3 One Zone-IA is for data that is accessed less frequently, but requires rapid access when needed. Unlike other S3 Storage Classes which store data in a minimum of three Availability Zones (AZs), S3 One Zone-IA stores data in a single AZ and costs 20% less than S3 Standard-IA. S3 One Zone-IA is ideal for customers who want a lower-cost option for infrequently accessed data but do not require the availability and resilience of S3 Standard or S3 Standard-IA. It’s a good choice for storing secondary backup copies of on-premises data or easily re-creatable data. You can also use it as cost-effective storage for data that is replicated from another AWS Region using S3 Cross-Region Replication.

S3 One Zone-IA offers the same high durability†, high throughput, and low latency of S3 Standard, with a low per GB storage price and per GB retrieval fee. S3 Storage Classes can be configured at the object level, and a single bucket can contain objects stored across S3 Standard, S3 Intelligent-Tiering, S3 Standard-IA, and S3 One Zone-IA. You can also use S3 Lifecycle policies to automatically transition objects between storage classes without any application changes.
Key Features:

Same low latency and high throughput performance of S3 Standard

Designed for durability of 99.999999999% of objects in a single Availability Zone†

Designed for 99.5% availability over a given year

Backed with the Amazon S3 Service Level Agreement for availability
Supports SSL for data in transit and encryption of data at rest
S3 Lifecycle management for automatic migration of objects to other S3 Storage Classes
† Because S3 One Zone-IA stores data in a single AWS Availability Zone, data stored in this storage class will be lost in the event of Availability Zone destruction.

When choosing what storage class to use think of this:

1. Low Cost(starting with Lowest)

1. Glacier

2. One Zone -IA

3. S3 -IA

Best Availability (Highest Availability)

1. S3

2. S3 -IA

3. OZ-IA

4. Glacier

Long Retention

One and Only : Glacier

Best Retrial Time:

1. S3

2. S3 -IA

3.OZ-IA

4. Glacier

Production / Critical Data

One and Only – S3