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  • Kristopher Augsburger thinks this is interesting:

2. What is the maximum amount of storage that can be allocated to an individual SharePoint Online site collection?

From

Cover of Exam Ref 70-347 Enabling Office 365 Services

Note

Up to 25 TB per site collection or group.

https://support.office.com/en-us/article/SharePoint-Online-limits-and-quotas-8f34ff47-b749-408b-abc0-b605e1f6d498?ui=en-US&rs=en-US&ad=US