Full target accounts stop OneDrive moves before cutover. Microsoft gives most plans 1 TB and lets admins raise or lower the limit per user. Learn what fills a target account, how to check limits in the admin center and follow 6 steps to size storage before you copy.
Your report shows green for 40 accounts and red for 3. Those 3 accounts hold the biggest folders in the company.
I see this on almost every OneDrive project. This guide explains why a OneDrive move fails when the target account is full, using Microsoft's own pages, and how to size storage before you start.
Why does a OneDrive Move Fail When the Target is Full?
Every OneDrive account has a storage limit, and a copy cannot write past it. When the source data is bigger than the target limit, the last files fail and the report fills with errors.
Heavy users hit this first. Old project folders, exported mailboxes and video files push one account over the limit while the other accounts finish clean.
How Much Storage does a OneDrive Account Get?
Microsoft's page on setting the default storage space for OneDrive users lists the numbers you need.
| Item | What Microsoft says |
|---|---|
| Default storage | 1 TB for most subscription plans |
| Maximum storage | Up to 5 TB, depending on plan and number of licensed users |
| Default limit setting | SharePoint admin center, Settings, OneDrive Storage limit, in GB |
| Smallest limit | 1 GB |
| License change | Storage updates within 24 hours after the user opens OneDrive |
| Limit lowered below usage | The account becomes read only |
What Fills up a Target OneDrive During a Copy?
Source size is the first number, but it is not the only one.
Existing files in the target count too. If a user already has data in the new account, your copy shares that space. Microsoft's page on what to do when OneDrive says it is full adds that recycle bin items count toward storage.
Microsoft says a full personal account cannot upload, edit or sync new files. Its page does not describe work accounts, so size every target before you copy.
How do You Check OneDrive Storage by Hand?
Open the Microsoft 365 admin center, go to Users, then Active users and select the user. The OneDrive tab shows storage used and the limit, for example 1024 GB.
That works for a handful of users. For hundreds of accounts you need a list of source sizes next to target limits, and Microsoft's page does not give a bulk view. Plan time to build that list in a sheet.
How do You Fix a OneDrive Storage Full Error Before Cutover?
I follow six steps before I start any batch.
- Total the source size. List every account with its data size.
- Check the target limit. Open the user in the admin center and read the limit on the OneDrive tab.
- Set the limit. In the SharePoint admin center, change the OneDrive Storage limit in GB. In PowerShell, Microsoft uses the storage quota setting in MB, where 1048576 equals 1 TB.
- Check licenses. Microsoft rounds values above a license allowance down to that maximum, so a high limit needs a plan that supports it.
- Empty the recycle bin. Microsoft says Recycle Bin items count toward storage, so clear them before you copy.
- Pilot the biggest account. Test it first, then fix the limit on any account that still fails.
To see how version history behaves after a move, read OneDrive version history after migration.
If you want to keep the old account while the copy finishes, read keep a copy of OneDrive data during migration. If skipped files stay missing, read OneDrive path too long error.
What are the Best Practices for OneDrive Storage During Migration?
- Size before you copy. One sheet of source sizes saves a failed batch.
- Raise limits early. Microsoft says license changes update storage within 24 hours.
- Clean the source. Delete old exports and duplicates first.
- Empty the recycle bin. Its items count toward storage.
- Pilot big accounts. The largest account shows the problem first.
Which Mistakes Cause a OneDrive Storage Full Error?
Teams repeat four errors. They size storage from the average account instead of the biggest one, and they forget that users already hold files in the target. They also lower a limit below usage, which makes the account read only, and forget that the recycle bin counts toward storage.
My Verdict on Full Target Accounts
Full targets are a planning problem. Microsoft sets the limits and your sheet decides who needs more room.
Size the biggest accounts first, raise limits before cutover and fix only what failed. Then the report ends green.
Frequently Asked Questions
How Much Storage does a OneDrive Account have?
The default is 1 TB for most subscription plans. The maximum is up to 5 TB, depending on your plan and number of licensed users.
How do I Check a User's OneDrive Storage Limit?
In the Microsoft 365 admin center, go to Users, then Active users, select the user and open the OneDrive tab. The maximum next to storage used is the limit.
How do I Increase OneDrive Storage for Migration?
Admins can set the default or a specific limit in the SharePoint admin center in GB. Values above a license allowance are rounded down to that maximum.
What Happens if I Lower a OneDrive Limit Below Usage?
The account becomes read only. Raise the limit again before you copy any more data.
Does the Recycle Bin Count Toward OneDrive Storage?
Yes. Microsoft says Recycle Bin items count toward storage on its page about a full OneDrive. Empty it when space is tight.
How do I Set OneDrive Storage in PowerShell?
Use Set-SPOTenant with the OneDriveStorageQuota setting and a value in MB. Microsoft's examples are 1048576 for 1 TB and 5242880 for 5 TB.
How do I Reset an Existing User to the New Default Limit?
The Set-SPOSite cmdlet takes the user's OneDrive URL and the StorageQuotaReset switch. The default applies to users who have no specific limit set.
Jamie blends strategic marketing insight with technical writing, turning migration and recovery topics into guidance that works for technical and general readers alike.
Published 20 October 2026. Storage limits and admin steps come from Microsoft's page on setting the default storage space for OneDrive users. Recycle bin and full account behavior come from Microsoft's page on what to do when OneDrive says it is full. Microsoft can change these limits, so check them before you plan.