Microsoft Office 365 cloud storage is not one shared allowance for your whole business. OneDrive, SharePoint and Exchange have separate quotas, while Teams stores files in OneDrive or SharePoint depending on how they are shared.
For an SME, that distinction matters: twenty employees with 1 TB each in OneDrive do not give the company a 20 TB shared document library. Understanding the separate limits helps you avoid unexpected restrictions and unnecessary upgrades.
What Microsoft Office 365 cloud storage includes
Microsoft now uses the Microsoft 365 name for its main SME subscriptions. Business Basic, Business Standard and Business Premium include cloud file storage, but personal work files and shared company documents use different allocations.
| Service | Standard allowance for these business plans | How the allowance works |
|---|---|---|
| OneDrive for Business | 1 TB per licensed user | Allocated individually, not pooled across employees |
| SharePoint Online | 1 TB per organisation, plus 10 GB per eligible licence | Shared across the organisation’s SharePoint sites |
| Exchange Online | 50 GB primary mailbox per licensed user | Separate from OneDrive and SharePoint file storage |
These allocations are documented in Microsoft’s OneDrive service description, SharePoint Online limits and Exchange Online limits. Other subscriptions can have different entitlements, so confirm your actual licences before budgeting.
For example, 25 eligible business licences normally provide 25 separate 1 TB OneDrive allocations and a SharePoint pool of 1 TB plus 250 GB. Administrators can also set individual quotas below the available entitlement.
The key to understanding Microsoft Office 365 cloud storage is separating each user’s allowance from the organisation’s shared capacity.
Where OneDrive, SharePoint and Teams files belong
OneDrive is an individual employee’s work storage. It suits personal working documents and drafts that the employee may occasionally share with colleagues. Despite the name, OneDrive for Business is part of your organisation’s managed environment, not a personal consumer account.
SharePoint is the usual home for shared business documents. Department folders, operational procedures and project libraries should normally remain accessible independently of any one employee’s account. That makes ownership easier to manage when someone changes roles or leaves.
Teams brings these storage locations into one interface. Files uploaded to a standard channel are stored in the team’s SharePoint site. Private and shared channels use separate SharePoint sites. Files uploaded from a device into a chat are normally stored in the uploader’s OneDrive and shared with the participants.
Meeting recordings can also consume OneDrive or SharePoint capacity, depending on the meeting type and recording location. Moving a document into Teams therefore does not create a new storage allowance.
A useful starting rule is to keep individual working files in OneDrive and business-owned team records in SharePoint. Assign an owner to each shared library so that access and retention decisions do not become nobody’s responsibility.
With Microsoft Office 365 cloud storage, the application staff use to open a file does not necessarily tell you which quota it consumes.
How to check your actual storage usage
Start with the administrative view rather than asking employees how full their laptops are. Cloud usage and local disk usage are different measurements.
An administrator with the appropriate permissions should:
- Confirm subscriptions: Check the Microsoft 365 admin centre for the exact plans and eligible licence quantities.
- Review shared capacity: Use the SharePoint admin centre to inspect the organisation’s storage allocation and consumption.
- Find the largest sites: Review site usage to identify departments, projects or recording libraries driving growth.
- Check individual accounts: Use OneDrive usage reports and account settings to find users approaching their quotas.
- Record the trend: Compare usage over time so that a temporary spike is not mistaken for steady growth.
Employees can access their work files through Microsoft 365 on the web, the OneDrive application or Teams. Available menus vary by account and permissions, so an end-user view is not a substitute for checking the organisation’s allocation.
OneDrive Files On-Demand can reduce the disk space used on a computer by keeping files online until needed. It does not reduce the cloud storage those files consume.
For Microsoft Office 365 cloud storage planning, record both the capacity remaining and the rate at which each storage location is growing.
What happens when a storage limit is reached?
An individual OneDrive account at its limit can lose the ability to upload or synchronise new content. Users may also encounter restrictions when editing files. Deleting a local copy will not help if the cloud copy remains and still counts towards the quota.
SharePoint capacity problems can affect whole teams rather than one person. A site-level quota can restrict a particular site even when the organisation still has capacity available. Exhausting the organisation’s overall allowance can lead to wider read-only restrictions.
Before buying anything, establish whether the problem is a deliberately restricted site quota, an individual account limit or a genuinely full shared pool. Those require different fixes.
There are also technical limits unrelated to total capacity. OneDrive and SharePoint support individual files up to 250 GB, subject to other service restrictions. A file can therefore fail to upload even when plenty of space remains. Path lengths, invalid names and synchronisation problems can produce similar symptoms.
Set an internal warning threshold, such as reviewing capacity when usage reaches 80%. That is a suggested operating threshold, not a Microsoft service limit.
A Microsoft Office 365 cloud storage warning should prompt a quota check and a growth review, not an automatic subscription upgrade.
Reduce avoidable usage before purchasing more
Review versions, duplicates and recordings
A document library can consume more space than the size of its current files suggests. Previous versions and copies preserved by retention controls may add to the total.
Review large libraries for duplicate exports, obsolete working copies and recordings that no longer serve a business purpose. Agree suitable version-history settings with the people responsible for the documents. Reducing version history without checking recovery requirements can remove useful protection.
Give particular attention to video, design assets and repeated data exports. A small number of large files can matter more than thousands of ordinary documents.
Check retention before deleting or moving content
Deleting a visible file does not always release capacity immediately. Retention policies and legal holds can preserve content after users remove it. Moving files can also create additional copies or retained versions, so a migration is not automatically a clean-up.
Ask whoever manages information governance to confirm what must be retained and where. A practical business data storage review should consider access, retention and recovery requirements alongside capacity.
Review departing employees’ files before removing licences. Confirm ownership, account retention arrangements and any applicable unlicensed-account archive charges rather than treating former staff accounts as permanent free archives.
The safest way to reduce Microsoft Office 365 cloud storage usage is to remove content through an agreed retention process, not simply delete the largest folders.
Should you buy extra storage or change your plan?
First identify which limit needs increasing. Spare OneDrive capacity cannot simply be transferred into the SharePoint pool, and adding mailbox capacity will not solve a full document library.
For the common business plans above, moving from Business Standard to Business Premium does not automatically increase the standard OneDrive allowance or the SharePoint storage formula. Premium may meet other security and management needs, but it should not be purchased on the assumption that it provides a larger shared file allowance.
Additional SharePoint storage can be purchased through eligible licensing arrangements. Ask for a quote based on your subscription and purchasing channel rather than relying on a generic online price. Some enterprise plans support higher OneDrive limits, but eligibility and configuration requirements need checking.
Use a simple forecast to decide when action is needed. If a shared pool has 300 GB free and net usage is growing by 50 GB a month, it has roughly six months of headroom. These are illustrative figures, not Microsoft limits. Allow extra capacity for migrations, retained content and seasonal projects.
An archive or alternative storage platform may suit infrequently accessed material, but check permissions, search, restoration and ongoing costs before moving it.
When comparing Microsoft Office 365 cloud storage options, request a costed response to the specific capacity problem rather than a general licence upgrade.
Keep sharing controls and recovery separate from capacity
More available space does not make information safer. Moving shared records into an employee’s OneDrive to avoid a SharePoint purchase may create ownership and access problems, even if it temporarily frees capacity.
Use named recipients where appropriate, grant only the access required and review external sharing regularly. Avoid making duplicate copies simply to give a supplier access when a controlled link would meet the need. Check that the recipient is correct before sharing sensitive material.
This guide to secure file-sharing rules for teams and external partners covers useful operational controls such as classification, approved channels and recipient verification. Its legal context is Jamaican, so UK organisations should apply their own UK data protection requirements rather than treat it as UK legal guidance.
Storage capacity is also separate from backup. Synchronisation can propagate an unwanted change, while retention and version history serve particular purposes and have their own limits. Define what you need to recover, how far back you need to go and how quickly the business must regain access.
CIS’s guide to what to check in Microsoft 365 backup provides a separate framework for reviewing those recovery requirements without confusing them with storage entitlements.
A sound Microsoft Office 365 cloud storage plan therefore needs three separate decisions: where files belong, who may access them and how they will be recovered.
Frequently asked questions
Do you get cloud storage with Office 365? Many business subscriptions include it. Microsoft 365 Business Basic, Business Standard and Business Premium each include 1 TB of OneDrive storage per licensed user, alongside the organisation’s SharePoint allowance. Check the exact subscription rather than assuming every Office-branded product includes the same services.
How do I access my Microsoft 365 cloud storage? Sign in with your work account through Microsoft 365 on the web and open OneDrive for individual work files or SharePoint for shared sites. Teams also provides access to files stored in those services. Your administrator controls permissions and availability.
Can we combine everyone’s OneDrive allowance into one company drive? No. Individual OneDrive quotas do not become a pooled shared allowance. Use SharePoint for shared business libraries and plan against its separate organisational capacity.
Do I have to pay for Microsoft cloud storage? Business storage is included within eligible paid subscriptions, up to their allowances. Extra capacity or additional services can cost more. Free consumer OneDrive storage is a separate offering and should not be treated as an extension of your business subscription.
Does deleting email free up file storage? Deleting ordinary mailbox content can reduce Exchange usage, not your OneDrive or SharePoint usage. Identify the affected service before clearing content. Microsoft Office 365 cloud storage does not operate as one interchangeable allowance across email and files.
Get a practical capacity plan for your business
Before spending more, establish your licensed entitlement, current usage and monthly growth. Then decide whether the right response is a quota adjustment, governed clean-up, additional capacity or a different home for particular files.
CIS provides Microsoft 365 and cloud services, managed IT support and backup and recovery planning for UK organisations. Speak to the team about reviewing your storage position and building a practical plan around how your business uses its data.
