Backing up 2 TB of home-server data to S3 Standard costs about $47 a month at AWS's list price. Switching the same backup to S3 Glacier Deep Archive brings it to about $2 a month, and a full restore costs roughly $52 more on top of the storage, plus AWS's data transfer charge, which I didn't price. That is the whole trade: storage gets around 23 times cheaper, and getting your files back takes 12 to 48 hours and a one-time fee. This post walks through the numbers, and through exactly what MyGround does when you turn the Deep Archive setting on.

All prices below are AWS list prices for US East (N. Virginia), read on 2026-10-29. Check the S3 pricing page before you rely on them, because AWS changes them and your region may differ.

What MyGround's Deep Archive setting does

MyGround backs up your apps with restic to any S3-compatible bucket. Since release v0.1.103 (October 2026) there is a checkbox in Settings, Backups: "Store backup data in S3 Glacier Deep Archive (AWS only)".…