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data-box-heavy-limits.md

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title Azure Data Box Heavy limits | Microsoft Docs
description Describes system limits and recommended sizes for the Microsoft Azure Data Box Heavy components and connections.
services databox
author stevenmatthew
ms.service azure-data-box-heavy
ms.topic concept-article
ms.date 03/06/2025
ms.author shaas

Azure Data Box Heavy limits

Consider these limits as you deploy and operate your Azure Data Box Heavy device. The following table describes these limits for the Data Box.

Data Box Heavy service limits

[!INCLUDE data-box-service-limits]

Data Box Heavy limits

  • Data Box Heavy can store a maximum of 1 billion files per node.
  • Data Box Heavy supports a maximum of 512 containers or shares per node in the cloud. The top-level directories within the user share become containers or Azure file shares in the cloud.
  • Data Box currently does not support a scenario in which the customer's data is actively changing during export.

Azure Storage limits

[!INCLUDE data-box-storage-limits]

Data upload caveats

[!INCLUDE data-box-data-upload-caveats]

Azure storage account size limits

[!INCLUDE data-box-storage-account-size-limits]

Azure object size limits

[!INCLUDE data-box-object-size-limits]

Azure block blob, page blob, and file naming conventions

[!INCLUDE data-box-naming-conventions]