Full storage but iv used 0.01 gb / 100

Question

Hi everyone,

I'm hoping someone can help me figure out what's going on with my Outlook.com storage.

About 24 hours ago I purchased the 100GB storage add-on for $2/month. After the purchase, my account was still showing "Storage Full" — even though it says I've only used 0.01 GB out of 100 GB. That makes no sense to me.

Thinking I might need a higher tier, I then went ahead and upgraded to Microsoft 365 Personal, which bumped my storage to 1TB. But the account is STILL showing as full.

Used storage: 0.01 GB

Available storage: 100 GB / 1 TB (depending on which plan is active) Status shown: Storage Full

Time since first purchase: ~24 hours

Has anyone experienced this before? Could it be a sync/refresh issue on Microsoft's end, or is there something I need to do manually to activate the storage? I'd also like to know if I can get a refund on the 100 GB plan since I ended up upgrading to Personal.

Any help would be greatly appreciated. Thanks!

Answer 1

Hi Billy,

I have gone through the issue. It seems like you are hitting a glitch which happens way too often. Microsoft Support can only sort this out for you since this is a user-user support forum.

Please contact Microsoft Support for further assistance.

Please go to the https://support.microsoft.com/contactus page

Type "Billing" and press Enter.

Please click on the "Contact support" button at the bottom.

Select the Product and Category for support based on your requirements.

The available support methods will be shown to you.

I hope this information helps. If you have any more questions, don't hesitate to reach out.

Otherwise, please take a moment to rate the answer. Wishing you good luck!

Answer 2

The “Storage full” status is almost certainly coming from Microsoft unified cloud storage (OneDrive + Outlook.com attachments + other Microsoft 365 data), not from the mailbox quota itself. That’s why Outlook.com can show something like “0.01 GB used of 100 GB mailbox” and still block sending/receiving mail.

From the documentation:

• Outlook.com email storage (15 GB free or 100 GB with Microsoft 365) is separate from Microsoft cloud storage.
• Microsoft cloud storage (5 GB free, or more with subscriptions) is shared across OneDrive files, Outlook.com attachments, and other Microsoft 365 apps.
• If Microsoft unified storage is exceeded, Outlook.com will block sending and receiving email, even if the mailbox itself is almost empty.

Key behaviors when Microsoft storage is full:

1. Cannot upload/edit/sync new OneDrive files; existing files become read‑only.
2. Cannot send or receive email in Outlook.com, even if email storage is under quota.
3. Cannot send or receive Teams messages with attachments.
4. After 6 months over quota, OneDrive and its files may be deleted.

What to do next

1. Confirm which storage is full
   • In Outlook.com, check both:
     • Mailbox storage (shows 0.01 GB / 100 GB or similar), and
     • Microsoft cloud storage (OneDrive + attachments). The warning banner and “Microsoft Unified Storage is full” message refer to this unified storage.
2. Free up Microsoft cloud storage if still over quota
   • Delete large or old files from OneDrive (including the OneDrive “Attachments” or “Email attachments” folders if present).
   • Empty OneDrive recycle bin so deleted items actually free space.
   • Large Outlook.com attachments also count toward Microsoft storage; deleting emails with big attachments and then emptying Deleted Items can help.
3. Allow time for quota refresh
   • After freeing space or changing plans, it can take some time for all services (Outlook.com, OneDrive, account portal) to reflect the new quota and clear the “Storage full” state.
4. If the account still shows “Storage full” despite being clearly under quota
   • This can be a stale sync state between the local OneDrive client and the cloud. A known workaround from a similar case was:
     • Unlink OneDrive from the PC.
     • Delete at least one file from OneDrive via the web.
     • Relink OneDrive to the PC.
   • This forces a refresh of the storage state.
5. About a refund for the 100 GB add‑on
   • Refunds and billing adjustments are handled through Microsoft’s subscription and billing support, not via Outlook.com settings.
   • Use the standard Microsoft subscription refund process described in the billing support article to request a refund for the 100 GB add‑on now that Microsoft 365 Personal is active.

If, after confirming that unified storage is clearly below quota and forcing a OneDrive refresh, Outlook.com still shows “Storage full,” the next step is to contact Microsoft support via the account/billing support channels so they can check the account’s storage state on the backend and assist with both the quota issue and any refund request.

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References:

• Storage limits in Outlook.com
• Microsoft storage FAQs
• Microsoft storage limit exceeded - Microsoft Q&A
• storage exceeded in outlook after purchasing MS 365 subscription - Microsoft Q&A
• How to get a refund on a Microsoft subscription