Microsoft 365 OneDrive Storage Cut: What to Do Before You Lose 4 TB
Microsoft is slashing OneDrive storage for Microsoft 365 Family and Premium subscribers, replacing each person’s 1 TB with a shared 2 TB pool — a drop from 6 TB to 2 TB at the same price. The change hits new subscriptions on October 8, 2026, and existing plans at renewal from May 2, 2027. Here’s what the Microsoft 365 OneDrive storage cut means for you and what you can do to prepare.
New and upgraded subscriptions get shared storage starting October 8, 2026.
For existing Microsoft 365 Family or Premium plans, the switch will happen when the plan renews on or after May 2, 2027, nothing changes before then, and Microsoft will email you before your renewal.
Quick thoughts
This is a blatant move by Microsoft to cut data center costs. Shrinking what Microsoft consumers get for their money means Microsoft can spend less on data center storage across the globe.
Like past changes to Microsoft 365 plans, Microsoft is also trying to get more money from consumers by pushing them to more expensive plans.
Some people sharing a Family or Premium plan will have to buy their own Microsoft 365 plan to keep their 1 TB of OneDrive. That’s also part of Microsoft’s strategy for these changes.
The new Microsoft 365 Pro plan has a huge price tag ($1,200 a year!) for not a lot more than Premium at $200 a year. Not to be confused with the Microsoft 365 Business Pro plan.
About the 2TB shared OneDrive
Until now, Family worked like six separate lockers. Each member got their own 1 TB, and unused space couldn’t be combined or handed to someone else.
Under the new rules, Family and Premium include 2 TB of shared storage, while Microsoft 365 Pro gets 5 TB. The main subscriber and up to five others all draw from that same pool.
Your files stay private. Each member can only see their own files unless they choose to share them. The change is about how space is divided, not who can see what.
It’s not clear how the shared pool will work in practice. It seems that any free space in the 2TB pool will be available to anyone on that plan. That means someone could upload lots of files to OneDrive and gobble up most or all of the 2TB quota, leaving little or nothing for the others on that plan.
Perhaps the plan owner will be able to allocate space to individual users, but there’s nothing in Microsoft’s announcement to suggest that.
What stays the same
The other plans stay as they are.
Microsoft 365 Basic keeps 100 GB for one person, and Personal keeps 1 TB for one person.
What does this mean for Family and Premium users
It depends entirely on how much your household actually stores on OneDrive and who uses what.
- You’re a winner if you’re the only real user, or one of two light users. You go from 1 TB to most or all of 2 TB. A Family or Premium plan owner who doesn’t share the plan can use the whole allotment.
- You’re probably fine if your whole family uses less than about 1.5 TB combined. That leaves breathing room.
- You’re a loser if several people are heavy users. Four family members each storing 700 GB of phone photos adds up to 2.8 TB, which is already 800 GB over the new limit.
Microsoft’s FAQ asks itself “Is this change a reduction in storage?” and then talks about flexibility instead of answering. Let’s answer it: for a busy family, yes, it’s a big reduction. Flexibility is nice, but 2 TB is 2 TB not the 6 TB customers paid for.
What happens if you’re over 2 TB of OneDrive?
We’ll have to wait and see how the OneDrive changes are applied in practice. All we have for the moment is Microsoft’s vague reassurances.
If a Family/Premium plan overall is over 2TB, you won’t lose access overnight. Microsoft says you’ll get warnings as you near the limit, and if you go over, you can keep accessing your files for up to one year while you sort out your storage.
Treat that year as a deadline, not a grace period. Microsoft doesn’t say what happens after 12 months. In past OneDrive storage cuts, accounts over quota became read-only, were later locked, and content could eventually be deleted. Don’t assume this time will be gentler.
Possible bonus storage?
Microsoft also says heavy users will get advance notice and transition support, and some existing Family and Premium subscribers in supported markets may receive bonus storage at renewal at no extra cost. There are no numbers yet on how much bonus storage, or for how long.
Buy extra storage
Up to now, anyone using a Microsoft 365 consumer plan (Personal, Family or Premium) could pay for more OneDrive storage, albeit at a fairly high price.
With the new shared pool, any additional purchased storage goes into the shared pool for everyone on that plan.
Warning: upgrading triggers the change early
This is the trap. If you switch plans before May 2, 2027, for example from Family to Premium, your subscription moves to shared storage right away.
So if your family relies on that 6 TB, don’t upgrade to Premium just to try Copilot features until you’ve checked your storage total.
Downgrading before that date does not trigger the switch; you stay on the current model until your renewal on or after May 2, 2027.
What you should do now
Existing Microsoft 365 consumers (Family or Premium plans) don’t need to do anything right away because the OneDrive changes won’t happen until at least May 2027.
In the coming months it would be wise to have a look at OneDrive usage across everyone using a Family or Premium plan.
- Add up your family’s usage. Each member can check their OneDrive storage page in their Microsoft account. Total the numbers; that’s the figure that matters from 2027.
- Note your renewal date. Your switch happens at the first renewal on or after May 2, 2027, so if you renew in, say, April, you effectively get almost an extra year on the old 6 TB model.
- Price the alternatives. You can buy extra storage and it goes into the shared pool, up to a total of 10 TB per subscription. Compare that cost against moving a heavy user’s photos to Google Photos, iCloud, or a local hard drive.
- Clean house. Empty the OneDrive Recycle Bin (it counts against your space), delete duplicate phone photo backups, and remove old PC backup folders nobody needs.
Wait for Microsoft’s email
Before making big moves, wait until you hear from Microsoft. It should spell out any bonus storage you qualify for.
OneDrive and Microsoft 365 changes
If you’re weighing up whether to buy more OneDrive space or move elsewhere, Get Up to 11 TB: How to Add More Microsoft OneDrive Storage to Your Microsoft 365 Plan walks through the purchasing process, and Google Just Bumped AI Pro to 5TB: How Does It Stack Up? compares what Google is now offering at roughly the same price.
One common reason OneDrive fills up is that Windows silently redirects your Documents, Desktop and Pictures folders into it. If that happened to you, Why did Windows move my files to OneDrive? (What it is & how to fix it) explains how to take back control and reclaim space.
OneDrive isn’t just a storage locker — it has built-in tools that might save you from paying for separate apps. What anyone can do with PDFs in OneDrive PDF Editor: Free Tools You Didn’t Know You Had covers the free tools, and Microsoft 365 subscribers can go further with How to Extract, Merge, Encrypt and Compress PDFs in OneDrive.
If the storage cut is pushing you toward Premium or Pro for Copilot, it’s worth understanding what you’re actually getting. Microsoft’s Copilot Super App: What’s New, What It Costs and What to Do Now breaks down the new Copilot lineup, and Two Microsoft 365 Licenses on One PC: Use Work and Personal Plans Together could save you from buying a second subscription if your employer already provides one.