For a period, I used Arq Backup with Amazon S3 Glacier as archival storage for my photos. I’ve got an alternative, faster, more convenient solution now and wanted to stop paying for storage at Amazon. Turns out clearing out a Glacier vault is neither easy, fast, nor straightforward. In the end, I used Leeroy Brun’s Glacier Vault Remove. While it couldn’t delete the vault automatically, it did empty it out overnight. I logged into AWS console to delete the vault. Here as reference for me and others who may run into this problem and need a tidy solution.