What should I do if the Onedrive prompt that the space is full even though I have already purchased a subscription?

The immediate course of action is to methodically verify your subscription status and the specific storage limits applied to your account, as the discrepancy typically stems from a licensing mismatch or a synchronization backlog rather than a true lack of provisioned space. First, confirm that your Microsoft 365 subscription is active and correctly assigned to the account in question by visiting the Microsoft 365 admin center or your account services page. A common issue is that a purchased subscription may be associated with a different Microsoft account than the one currently in use, or an organizational license may not have been fully provisioned. Simultaneously, check the exact storage quota within your OneDrive settings; some business or family plans allocate a specific pool of shared storage, and your individual allotment within that pool may be less than the total. This diagnostic step is critical because the system prompt is a direct reflection of the quota it recognizes, which may not align with your purchase due to these administrative or assignment errors.

If your subscription is confirmed as active and correctly assigned, the next likely culprit is the OneDrive sync engine's handling of file versions and the Recycle Bin, which consume quota space invisibly to many users. OneDrive retains previous versions of files and stores deleted items in a Recycle Bin for a default period, both of which count against your total storage allocation. A seemingly empty OneDrive folder can still be burdened by gigabytes of historical data. You must manually empty the Second-stage Recycle Bin from the OneDrive web interface to permanently purge these items. Furthermore, inspect for large, unnecessary version histories on individual files, particularly for documents like PowerPoint presentations or databases that are frequently saved. Reducing the number of retained versions for such files can reclaim significant space. This mechanism explains why a theoretically adequate subscription appears full: the allocated space is occupied by ancillary data that is not immediately visible through the standard file explorer view.

When basic checks and cleanup do not resolve the issue, the problem may involve synchronization conflicts or cached local storage reporting. A corrupted sync cache can cause the client to misreport available space. Resetting OneDrive by exiting the application, using the task manager to ensure all processes are closed, and then running the 'Reset' command via the Run dialog (`%localappdata%\Microsoft\OneDrive\onedrive.exe /reset`) can clear this state and force a fresh sync, often correcting the false full notification. For users within an organization, an administrator may have set restrictive storage policies that override the default subscription limits, necessitating a ticket with your IT department. As a final and definitive step, accessing OneDrive via the web portal provides the most authoritative view of your storage breakdown, isolating the issue to either the local client software or the cloud service itself. Persistent discrepancies after these steps require direct support from Microsoft, as they may indicate a service-side provisioning error that only their backend systems can rectify.