task_scheduler/bucket-lifecycle-config.json

{
  "lifecycle": {
    "rule": [
      {
        "action": {
          "type": "SetStorageClass",
          "storageClass": "NEARLINE"
        },
        "condition": {
          "age": 30,
          "matchesStorageClass": [
            "MULTI_REGIONAL",
            "STANDARD",
            "DURABLE_REDUCED_AVAILABILITY"
          ]
        }
      },
      {
        "action": {
          "type": "SetStorageClass",
          "storageClass": "COLDLINE"
        },
        "condition": {
          "age": 365,
          "matchesStorageClass": [
            "NEARLINE"
          ]
        }
      }
    ]
  }
}