So you can put your data into glacier with 2 differents ways:
1) directly to glacier via API
2) Store them to s3 then with a management policy, it'll go to Glacier
Warning : Huge cost when you download from glacier and when you delete before 3 months
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https://www.cloudberrylab.com/blog/compare-amazon-glacier-direct-upload-and-glacier-upload-through-amazon-s3/