Archive access tier

This tier is meant for rarely accessed storage and it is the cheapest tier, as the terabyte would cost about $2.05 per month. Since this data will be offline, it can take up to 15 hours to move back to another tier to be able to access it again.

This tier is available at the blob level, not the storage account. It can be used as backup solution also but for long-term plans because you will barely access this data and in the meantime to benefit from its price or just storing your old data for compliance to the company's policies.