One time cost of conversion from Glacier Flexible Retrieval to Glacier Deep Archive

Full FAQ on Glacier Deep Archive is available here.

S3 Lifecycle Transition request pricing below represents requests to that storage class. For example, transitioning data from S3 Standard to S3 Standard-Infrequent Access will be charged $0.01 per 1,000 requests. Likewise to move Deep Archive is $0.05 per 1,000 requests. (These are us-east-1 prices. Prices vary by region. Select the correct region in the following link for your use case.) https://aws.amazon.com/s3/pricing/?nc=sn&loc=4

Hope this helps!