Alternatively, organizations may opt for Azure File Storage for increased capacity, though it is not "plug and play" like Microsoft 365 storage. Cost Considerations
When storage limits are reached, SharePoint sites will move to a read-only mode. License Types
Purchasing or expanding SharePoint typically involves subscribing to Microsoft 365, as SharePoint Online is included in most business plans. For existing users, additional storage can be bought directly through the Microsoft 365 Admin Center. How to Buy/Add SharePoint Storage
As of late 2025, additional storage can cost around $0.20 per GB per month, which can exceed $2,000 per TB annually.
Before purchasing more storage, it is recommended to manage site storage limits, remove old versions of files, or archive inactive data.
To give you the most accurate purchasing options, I can help you find: for a certain number of users. Which Microsoft 365 plans include the features you need. How to check your current usage before buying more. SharePoint Online out of storage space - Microsoft Learn
Includes SharePoint as part of the suite (e.g., Business Basic, Standard, Premium; E3, E5).
