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Backup for Storage Account Blob

Sumit Bhardwaj 80 Reputation points
2025-08-11T23:05:24.6766667+00:00

Hello, I’m planning to set up a backup for my Azure Storage Account and I have a few questions:

How quickly can backup data be accessed in case of a restore?

Is it possible to increase the backup frequency beyond the default schedule?

  1. What would the estimated cost be for storing backup data, depending on redundancy options? (Geo-Redundent)

Currently I have 3 MB of data stored which needs to be backed up. I’d appreciate any insights or best practices from those who have implemented backups for Azure Storage.

Azure Backup
Azure Backup
An Azure backup service that provides built-in management at scale.
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  1. Vinodh247 36,031 Reputation points MVP Volunteer Moderator
    2025-08-12T01:04:03.7333333+00:00

    Hi ,

    Thanks for reaching out to Microsoft Q&A.

    1. Restore access time

    Azure’s native backup for Blob Storage is handled via Azure Backup for Azure Blob Storage or features like Soft Delete + Versioning + Point-in-time Restore (PITR).

    • PITR for block blobs is near instant for small datasets (a few MB to a few GB). The actual speed depends on the number of blobs and the restore point, but for your 3 MB, the restore would be seconds to minutes.
    • Backup for Blob Storage restores usually involve copying data from backup snapshots to the live container. In small volumes, it is almost immediate, but for large datasets, it could take hours depending on throughput limits.

    For prod grade scenarios, PITR is recommended for min downtime.

    1. Backup frequency beyond default

    Azure Backup for Blobs uses daily snapshots by default.

    You cannot make it run, for example, every 5 minutes like a database backup.

    • For more frequent backup needs:

    Use Blob change feed + Event Grid + custom archiving to another storage account.

    • Use AzCopy or ADF to replicate at custom intervals.

    Third-party tools like Veeam or Commvault can give you sub-hourly schedules.

    1. Cost estimation (Geo-redundant)

    Azure pricing for backup storage depends on:

    Storage used (in GB)

    Redundancy level: LRS (local), ZRS (zone), GRS (geo), RA-GRS (geo + read access)

    Backup snapshot retention

    For 3 MB with GRS, the cost will be negligible - Azure charges per GB per month.

    Example calculation (2025 prices approx.):

    GRS: around $0.046/GB/month

    3 MB = 0.003 GB

    • Monthly cost ≈ $0.046 × 0.003 ≈ $0.000138 (~0.01 INR/month), basically zero at your scale. If you retain many versions or have frequent snapshots, cost scales linearly with total snapshot size.

    Best practices

    Enable Blob versioning and Soft delete for containers and blobs.

    Use PITR for rapid recovery.

    1. For higher frequency than daily, set up event driven replication or incr copy jobs.
    2. Test restore scenarios periodically, do not wait for a real disaster to discover configuration issues.

    Please 'Upvote'(Thumbs-up) and 'Accept' as answer if the reply was helpful. This will be benefitting other community members who face the same issue.

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