Azure Migrate and Azure Data Box
😟 THE PROBLEM
Hundreds of servers to move, and uploading the data would take months.
😊 THE SOLUTION
Plan with Azure Migrate; ship bulk data with Azure Data Box.
- Don’t know what’s ready to move✓ Discover and assess with Azure Migrate
- Uploading 300 TB takes months✓ Ship it on Data Box
- No overall progress view✓ One migration dashboard
Quick answer
Azure Migrate is a central hub of tools to discover, assess and migrate on-premises servers, databases, web apps and virtual desktops to Azure, and to track progress in one place. Azure Data Box is a rugged physical device Microsoft ships to you. You load it with large amounts of data and send it back, so you can move terabytes when the network is too slow or expensive.
Exam objective: 2.3.6 Describe migration options, including Azure Migrate and Azure Data Box. (Skills measured as of July 20, 2026)
Start with a question
It would take 4 months to upload your data over the office internet. Is there a faster way?
Yes. Put it in a box and ship it. That’s Azure Data Box. And for planning the whole move, there’s Azure Migrate.
Explain it like I’m 10
The technical explanation
Azure Migrate provides integrated tools for discovery, assessment and migration of servers (VMware, Hyper-V, physical), databases (with Database Migration Service), web apps and VDI, plus a business case feature comparing on-premises and Azure costs.
Azure Data Box devices are encrypted, rugged and shipped by courier. Typical uses: one-time bulk migration, initial data seeding, periodic uploads of large data, and exporting data from Azure for disaster recovery or compliance.
Real-world business scenario
A media company
- The problem
- Its archive of 300 TB of video had to move to Azure, but the office connection would have taken months.
- What they used
- Azure Migrate to assess and move the servers; Azure Data Box devices to ship the video archive; AzCopy to sync the final changes.
- Why that choice
- Physical transfer for the bulk, network tools for the small delta.
- The result
- Migration finished in weeks instead of months.
When to use it and when not to
✓ Use it when…
- **Migrate** for any planned move of on-premises workloads.
- **Data Box** for tens or hundreds of terabytes over limited bandwidth.
✕ Think twice when…
- Data Box for small data sets that copy quickly over the network.
Interview preparation
Say your answer out loud first, then open the model answer. Interviewers care more about your reasoning than the exact words.
Beginner What is Azure Migrate?
Model answer
A hub in Azure that helps move on-premises systems to the cloud. It discovers what you have, assesses readiness and cost, and helps perform the migration, all tracked in one dashboard.
Intermediate When would you use Azure Data Box?
Model answer
When I need to move a very large amount of data and the network would take too long or cost too much. Examples are a one-time datacenter migration, an initial bulk upload before ongoing sync, or exporting data out of Azure. After upload, Microsoft wipes the device securely.
Experienced developer How would you combine Data Box with online tools?
Model answer
Seed the bulk of the data with Data Box, then use AzCopy, Azure File Sync or replication to transfer the changes made while the device was in transit. That avoids weeks of network transfer while keeping data current.
Test yourself with exercises
3 original practice questions in the AZ-900 style. Pick your answers, then check them. You will see why each option is right or wrong. Score 75% or more and this topic is marked complete.
Quick revision
Key points
- Azure Migrate = discover, assess and migrate workloads, in one hub.
- Includes tools for servers, databases, web apps and data.
- Azure Data Box = physical device for offline bulk data transfer.
- Data Box also works for exporting data out of Azure.
Important terminology
- Azure Migrate
- A unified hub for discovery, assessment and migration of workloads to Azure.
- Assessment
- Analysis of readiness, right-sizing and estimated cost before migrating.
- Azure Data Box
- A physical storage device for offline transfer of large data sets to or from Azure.
Common mistakes
- Thinking Data Box is a network service.
Exam tips
- "Move huge amounts of data when the network is too slow" = Azure Data Box.
- "Discover and assess on-premises servers before migration" = Azure Migrate.
Five quick revision questions
-
1.What are the three main jobs of Azure Migrate?Show
Discover, assess and migrate.
-
2.What is Azure Data Box?Show
A physical device for offline transfer of large data to or from Azure.
-
3.When would you use Data Box instead of the network?Show
When the data is too large or the network too slow or costly.
-
4.Can Data Box export data from Azure?Show
Yes.
-
5.What happens to a Data Box after the data is uploaded?Show
Microsoft securely erases it.
Official references
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