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License & Subscription Issues

How to Add More SharePoint Storage for an Organization in Microsoft 365

Maira MehtabMaira Mehtab Sep 22, 2026 868 views

Question details

The organization needs to increase its available SharePoint storage capacity after reaching the default Microsoft 365 storage limits.

Product
Microsoft 365 / SharePoint
Device & OS
not provided
Scenario
The organization's SharePoint site collections have hit their storage capacity, and an administrator needs to buy additional space.
Observed behavior
The goal is to navigate the Microsoft 365 admin center to successfully purchase the 'Office 365 Extra File Storage' add-on.
Before you start

Ensure that you are signed in with an account that has Global Administrator or Billing Administrator privileges in the Microsoft 365 admin center, as standard users cannot authorize storage purchases.

Solution 1Recommended

Purchase Extra File Storage via Microsoft 365 Admin Center

Use the billing section of your Microsoft 365 admin center to buy additional gigabytes of storage for your SharePoint environments.

If your base subscription is eligible, you can seamlessly expand your tenant's capacity by purchasing the Office 365 Extra File Storage add-on.

1
Access the Microsoft 365 admin center

Log in to the Microsoft 365 admin center using your administrator credentials.

2
Navigate to Purchase services

On the left navigation menu, select 'Billing' and then click on 'Purchase services'.

3
Locate the storage add-on

Use the search bar or browse the catalog to find the 'Office 365 Extra File Storage' add-on.

4
Specify the amount and checkout

Select the required amount of additional storage in gigabytes, add it to your cart, and complete the checkout process to apply it to your tenant.

Manage Limits: After purchasing, you can distribute this extra capacity by modifying site collection storage limits within the SharePoint admin center.
Free Microsoft Office alternative

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  1. 1. Visit the WPS Office website: Go to the official WPS Office website on your computer or mobile device.
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Frequently Asked Questions

Who has the permission to buy extra SharePoint storage?

Only users assigned the Global Administrator or Billing Administrator role within your Microsoft 365 tenant can purchase the Office 365 Extra File Storage add-on.

Why can't I find the Office 365 Extra File Storage option?

If you cannot see this add-on in the 'Purchase services' section, your current base Microsoft 365 subscription might not be eligible for extra storage purchases, or you may lack the required admin permissions.

How is the newly purchased SharePoint storage applied?

Once the checkout is complete, the extra storage is added to your tenant's total pool. You can then allocate this space by adjusting the maximum storage limits for individual site collections in the SharePoint admin center.