Study Azure AZ-900 Storage Services: key concepts, common traps, and exam decision cues.
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Storage questions on AZ-900 are mostly about classification. Microsoft wants you to know the difference between the main Azure storage options, how tiers and redundancy affect design, and which tools help move or migrate files.
High-yield storage ideas
Topic
What to keep straight
Storage services
blob, file, queue, and table style service categories
Storage tiers
different access and cost patterns
Redundancy
copies of data across different scopes
Storage account options
the account is the management boundary for many storage features
File movement
AzCopy, Storage Explorer, Azure File Sync
Migration
Azure Migrate and Azure Data Box
Storage-family chooser
Need
Strongest first fit
object storage
Blob Storage
managed file shares
Azure Files
message storage in queue form
Queue storage
simple NoSQL key-value table store
Table storage
Tiers and redundancy are different decisions
Decision
What it is really about
access tier
hot, cool, or archive style access pattern and cost
redundancy
how many copies exist and across what failure boundary
If the stem says “infrequently accessed data,” think tier. If it says “survive wider failure,” think redundancy.
Movement and migration tools
Tool
Strongest first use
AzCopy
command-line data copy into or out of Azure Storage
Storage Explorer
graphical storage management and transfer
Azure File Sync
extend file-share presence between Windows servers and Azure Files
Azure Migrate
broader migration planning and movement
Azure Data Box
physical data-transfer option when the network is not the best path
Decision order that usually wins
Decide whether the requirement is object, file, disk, or archive storage.
Match the access pattern before thinking about redundancy.
Keep Blob, Files, and managed disk semantics separate.
Use lifecycle and tiering clues to narrow object-storage answers.
Choose the storage service that fits how the workload reads and writes data.