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
If your organization has run out of space, you can add more storage through the Microsoft 365 Admin Center : to the Admin Center. Navigate to Billing > Purchase services . Select Additional SharePoint Storage . Choose the amount (in GB) and complete the purchase. SharePoint Storage Structure
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 buy sharepoint
As of late 2025, additional storage can cost around $0.20 per GB per month, which can exceed $2,000 per TB annually.
When storage limits are reached, SharePoint sites will move to a read-only mode. License Types To give you the most accurate purchasing options,
You can purchase extra storage to increase the total capacity.
Organizations typically start with a base of 1 TB, plus 10 GB per licensed user. SharePoint Online out of storage space - Microsoft
Alternatively, organizations may opt for Azure File Storage for increased capacity, though it is not "plug and play" like Microsoft 365 storage. Cost Considerations