There exists the capability inside of the office 365 administration to create a storage account at Microsoft’s cost. The intention is that you use it for high speed migrations either Exchange or SharePoint.
Navigate to the Admin Center in Office 365 and then choose the import option on the left (may require first release)
Choose “Upload the Files over the network”
Choose Get/Show Key and & URL on the Page
You should now have an Azure Key that you can use in the first text box and the second will be a url like https://139480f098f09318083.blob.core.windows.net/ingestiondata/
This means your storage account name is “139480f098f09318083” and so the same key/account name can be used to mount in storage explorer, use the storage queue service, etc.
Its not like storage is very expensive with Azure, however it removes one more barrier to the migrations for Office 365 Administrators.