Microsoft describes the change as added flexibility. That is accurate, but the total for a full plan still drops by two thirds. Below is what changed, who is affected, when it applies, and what to check before your renewal.
What exactly changed
Microsoft's support page now says that Microsoft 365 subscriptions now use shared cloud storage instead of individual user storage quotas. The figures: Microsoft 365 Family and Premium subscriptions include 2 TB of shared cloud storage, and Microsoft 365 Pro includes 5 TB. The primary subscriber and up to five additional members draw from the same shared storage pool.
The old arrangement was simpler. Each person received 1TB of OneDrive cloud storage, giving a family of six a combined 6TB of storage. Those were six separate quotas, though, and that is the problem Microsoft says it is solving. Under the old rules, one member who used up their own terabyte could not borrow anyone else's unused space. A Microsoft Q&A answer from earlier this year put it plainly: it cannot be shared or merged into one account. So even if others are not using their 1TB, you still cannot use it.
Under the new model, one person can use the entire 2TB allocation if other members aren't using it.
| Plan | Old model | New model |
|---|---|---|
| Microsoft 365 Basic | 100 GB, one person | 100 GB, one person (unchanged) |
| Microsoft 365 Personal | 1 TB, one person | 1 TB, one person (unchanged) |
| Microsoft 365 Family | 1 TB each, up to 6 people | 2 TB shared, up to 6 people |
| Microsoft 365 Premium | 1 TB each, up to 6 people | 2 TB shared, up to 6 people |
| Microsoft 365 Pro | 1 TB each, up to 6 people (per Microsoft's quota page) | 5 TB shared, up to 6 people |
Section summary: Family and Premium move from six private 1 TB buckets to one shared 2 TB pool. A solo user or a single heavy user gets more room. A full household of six loses up to 4 TB.
Is it a cut or not?
Microsoft's FAQ includes the question "Is this change a reduction in storage?" Its answer says total storage varies by plan and stresses flexibility, without saying yes or no. The real answer depends on how your household uses OneDrive:
- A Family subscriber who never shared the plan had 1 TB and now gets 2 TB. That is a clear gain.
- One heavy user plus a few light users also comes out ahead. Someone with 1.5 TB of photos no longer hits a wall while relatives leave space unused.
- Six active members who each use several hundred gigabytes lose out. If the household's combined usage is above 2 TB, someone has to delete files, buy more storage, or upgrade.
Neowin, which first reported the change, called it a 66.7% reduction in total available storage. The arithmetic holds for a fully used plan. It also pointed out that long-time subscribers may already have built up large libraries in their individual accounts.
Privacy: pooled storage, not pooled files
Some families will worry that sharing storage means sharing files. It does not. Microsoft says that while storage quotas are shared, files remain private. Each member can access only their own files unless they explicitly share content with others. Shared storage changes how storage is allocated across the subscription, not who can see your files.
When it takes effect, and conflicting dates
On timing, Microsoft's own documentation does not agree with itself.
The main "Changes to Microsoft 365 storage" page says new and upgraded subscriptions get shared storage starting October 8, 2026. Existing subscriptions move over when they renew on or after May 2, 2027. It confirms that for existing Microsoft 365 Family and Premium subscribers, the transition to shared storage generally takes effect after the first subscription renewal that occurs on or after May 2, 2027. The page also says nothing changes before then and that subscribers will get an email before their renewal.
Microsoft's separate "Microsoft storage quotas" page gives different dates. It says new Family and Premium subscriptions get 2 TB shared storage from October 7, 2026, including expired subscriptions that are repurchased, and that existing subscriptions switch at renewal starting April 1, 2027. That page also gives a Pro-specific date: existing Pro subscriptions move to 5 TB shared storage on November 1, 2027.
Until Microsoft fixes the mismatch, treat the April–May 2027 window as the period when existing Family and Premium subscribers could be moved. Watch for the advance email. Don't apply the Family/Premium schedule to Pro.
Plan changes can move you sooner
- Upgrading before the transition moves you to the shared model straight away. Microsoft's example is moving from Family to Premium, which gives you 2 TB shared.
- Downgrading does not by itself trigger the switch. Your current model stays in place until your renewal on or after the transition date.
If your household currently uses more than 2 TB, think twice before switching plans in the next few months.
Section summary: The change applies to new subscriptions now. Existing subscribers have until their first renewal in spring 2027, and the exact date depends on which Microsoft page you read.
Bonus storage: possible, not promised
Microsoft offers existing subscribers a partial cushion. Existing Microsoft 365 Family and Premium customers who meet eligibility requirements in supported markets might receive bonus storage when their subscription renews after shared storage rolls out. Microsoft says the bonus costs nothing extra and is added to the plan's included storage.
What Microsoft has not said is how much bonus storage there is, who qualifies, or which markets count. The wording is "might," so don't plan your storage around it.
What happens if your family is over 2 TB
Microsoft says subscribers approaching the limit will get notifications. Its options are freeing up space, buying more storage, or upgrading. The main transition page also says that if a subscription goes over the limit, members can keep accessing their files for up to a year while they sort out their storage.
Microsoft's general quota page describes harsher rules for being over quota. OneDrive stops uploads, edits and syncing of new files, and existing files become read-only. After three months over the limit the OneDrive is frozen. After six months Microsoft may delete the OneDrive and its files, and the page says deleted files can't be recovered. It also notes that going over quota can stop Outlook.com from sending or receiving email.
Microsoft hasn't explained how the one-year access promise and the three- and six-month deadlines fit together. The safe reading is that "access" probably means you can open and download files, not that everything keeps working normally. Plan to be under 2 TB before your renewal, not after it.
Buying more storage
Microsoft says Family, Premium, Personal and Pro subscribers can add OneDrive storage up to a total of 10 TB. Storage add-ons purchased by subscription members are automatically added to the shared pool. Microsoft's quota page also says only the subscription account holder can add storage. That answers a long-standing complaint: under the old model, a forum user found that family members only have 1TB, they can't buy more. Pooling means storage the account holder buys now benefits every member.
How to prepare: a short checklist
- Find your renewal date. Sign in to your Microsoft account's subscription page and note when Family or Premium renews. That date, compared with the April/May 2027 dates, tells you when you'll switch.
- Add up everyone's usage. Each member can see their own usage in the storage section of their Microsoft account dashboard. Total it across the household and compare it with 2 TB.
- Clean up the big items first. Microsoft's quota page suggests viewing your largest OneDrive files, trimming Loop workspace page history, and deleting unneeded Designer projects.
- Watch the OneDrive tray icon on Windows. Microsoft says a cloud icon with a yellow warning triangle means storage is nearly full. A red circle with a white minus sign means you've gone over.
- Don't switch plans without thinking it through. An upgrade before your scheduled date moves you to the shared model early.
- Look out for Microsoft's email about the change and any bonus storage before your renewal.
Context: pooled storage has been used before
Microsoft has made this kind of change before. In education, Microsoft announced storage changes in 2023 under which, beginning August 1, 2024, all Microsoft 365 for Education suites will receive 100TB of free pooled storage across OneDrive, SharePoint, and Exchange. Schools that were used to generous per-user quotas had to start managing shared capacity. Consumers are now getting a similar model.
Neowin also linked the change to the January 2025 Microsoft 365 price increases, which Microsoft tied to Copilot features, and to AI-driven demand for storage hardware. The outlet itself stopped short of saying cost pressures caused the decision. Microsoft's support pages give flexibility as the only reason. Whatever the motive, the outcome is the same: a full Family plan now includes 2 TB instead of 6 TB.
Bottom line
For solo users and households with one heavy user, pooling is an improvement and fixes a real frustration. For a busy family of six, it is a cut, regardless of how Microsoft frames it. Existing subscribers have until a spring 2027 renewal, so you have time to check usage, clean up, and decide whether extra storage or another provider makes sense before Microsoft makes that choice for you.