One of the big selling points of cloud services is that storage feels endless.
In reality, Microsoft 365 gives your organisation a generous allowance, then starts charging extra once you pass those limits. If nobody actively manages storage, you drift towards paying more, or end up forcing staff to delete things in a hurry.
Most recruitment businesses never hit those limits on day one. The problem arrives slowly, through years of habits:
The good news is that Microsoft 365 gives you the tools to manage storage properly. With a bit of structure and a few simple rules, you stay within your allowance, reduce clutter, and still keep the data the business needs.
This article walks through:
Exact limits vary by licence, but the broad picture looks like this for most tenants:
OneDrive storage is per user. Large files, personal hoarding and poor sharing habits eat into this allowance over time.
For most subscriptions, SharePoint Online storage is:
This capacity is shared across the whole tenant. For example, an organisation with 75 employees receives:
1 TB + (10 GB × 75) = 1.75 TB of SharePoint storage.
Heavy use in one area or site affects everyone, so ownership and monitoring matter.
Mailbox limits depend on the licence:
This covers inbox, sent items and attachments. Old mail and large attachments left in place for years slowly fill the allowance.
These numbers are generous for normal use. Poor structure, duplication and “never delete anything” habits push tenants towards their limits faster than they expect.
SharePoint usually holds core business documents and shared resources. That makes it the first place to focus.
A clear, logical structure reduces duplication and keeps storage efficient.
A simple pattern that works for many organisations:
For example:
Sales → Europe → 2025 → Customer Proposals
This approach avoids one folder per client with copies of the same proposal in each. Staff use search and filters to find the right document rather than creating duplicates for every scenario.
Keep an eye on path length. SharePoint has a 250character limit on file paths, including folders and file name. Deep nesting makes that limit easier to hit and harder to manage.
Folders alone do not handle every retrieval need.
In the Sales example, someone might save “202505 – companyName Proposal.docx”. That works until a user names a file poorly or forgets the company name.
Metadata fills this gap. SharePoint lets you define custom columns such as:
Users then tag documents, and search uses those fields as well as the file name. This improves findability and reduces the urge to create multiple copies “in case someone cannot find it later”.
Before cloud storage, people created separate versions of a document for safety:
“202505 – customerName Proposal v1.2.1.docx”
Each version ate storage and cluttered folders.
SharePoint (and OneDrive) keep version history by default. Older versions stay attached to a single document. Users roll back when needed without storing multiple nearidentical files.
This approach:
For organisations that lifted old file servers into SharePoint without cleanup, reviewing version history and old copies is an easy storage win.
Some documents must stay for compliance or audit reasons. Others lose value quickly.
If nothing ever leaves SharePoint, storage usage grows year after year.
Shortterm options include:
Longerterm, consider services such as:
These options provide lowcost storage for older content. Archive data no longer counts towards SharePoint capacity, while remaining available for compliance and reference.
The aim is simple: keep live SharePoint focused on recent and active work. Move historical content into cheaper, long-term storage.
OneDrive is personal storage linked to each user. Without guidance, it turns into another “desktop in the cloud” full of everything.
Everyone has a personal way of storing files. The goal is not to force a single pattern, but to encourage consistency.
A predictable structure inside OneDrive reduces:
Large files such as videos or 3D models deserve special attention. For most users, these are better on local devices unless they need to be shared or edited by others.
When OneDrive nears its limit, start with the biggest items.
A small number of large files consumes more space than hundreds of Word documents. Removing or relocating these items has the biggest impact.
In the OneDrive web interface, use search filters such as:
size:>100mb
This surfaces files over 100 MB. From there, decide which to:
Remember to empty the OneDrive recycle bin. Deleted items still count towards storage until the bin is cleared or retention expires.
OneDrive excels at sharing and collaboration, but sharing has storage implications.
When you share a file or folder from your OneDrive, any additions from the recipient count against your storage. For large shared areas, SharePoint provides a better home.
Examples:
The rule of thumb:
Beyond daily habits, Microsoft 365 includes features that help keep storage under control at tenant level.
Set SharePoint site storage limits
By default, a new SharePoint site has a theoretical upper limit up to 25 TB. In practice, the organisation allocation will run out before a single site reaches that figure.
Leaving every site without limits invites imbalance. One team with heavy storage use then eats far more than its fair share.
Setting automatic or manual limits per site introduces basic fairness and control. Limits differ by organisation, but the aim is to:
An IT provider or internal admin team can configure and adjust these limits as business needs change.
Automate elements of storage management with Power Automate
For organisations with specific needs, Power Automate introduces lightweight automation.
Examples:
These flows reduce manual monitoring and help enforce agreed rules without heavy policing.
Microsoft 365 includes plenty of storage. The challenge lies in managing it well over time.
For inhouse IT teams already stretched with support and project work, storage optimisation easily slips down the list. Reviewing structures, designing archives and monitoring usage across SharePoint, OneDrive and mailboxes takes time.
A managed service provider with strong Microsoft 365 experience helps by:
The goal is not to squeeze every last gigabyte, but to keep storage predictable, fair and aligned with how your business works.
If your tenant has started throwing storage warnings, or you suspect old habits are burning through space in the background, this is a good moment to step back and plan. A little structure now saves money, avoids future disruption, and makes everyday work smoother for your team.
