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•Create periodic blob snapshots (since the vhd is stored in a Windows Azure Storage blob). Initially snapshots don't really take up any space since they're effectively an index of storage pages. Over time, if these pages change, then the snapshot(s) grow in size. You can create as many snapshots as you want, but you'll need to purge them over time to avoid storage growth as your vhd changes.
•Create blob copies. This is a complete copy of the vhd, unlike the snapshot. And you can make copies across storage accounts (or even across data centers).
Thanks Mostafa. Please share helpful links.
How we can backup with the help of DPM? Please share more details if you have idea
