我無法做Backup and OneDrive not workable

Subject: Urgent Account and OneDrive Storage Issue Due to Copilot Login

Dear Microsoft Support Team,

I am writing to seek urgent assistance regarding a complex issue involving multiple Microsoft accounts, OneDrive storage, and Copilot functionality.

Approximately one month ago, I subscribed to Microsoft 365 using my primary account: m.hk. On July 5, I encountered a login prompt from Copilot and, in order to preserve my conversation history, I created a new Microsoft account: ******@outlook.com.

Since then, I have noticed that OneDrive associated with the new account has exceeded its 5GB limit, even though I did not intentionally store any files there. As a result, my original account is now unable to perform backups, and I suspect that system-level auto-backup or Copilot-related storage may have redirected files to the new account.

Currently, I am not logged into Copilot, and I am concerned about the integrity of my subscription, the location of my files, and the inability to manage backups properly.

I would appreciate your help in:

1. Confirming which account holds the active Microsoft 365 subscription.
2. Identifying what data is stored in OneDrive under ******@outlook.com and why it exceeded the quota.
3. Assisting me in restoring backup functionality to ******@yahoo.com.hk.
4. Advising how to safely consolidate usage under my primary account without losing Copilot history or OneDrive data.

Thank you for your time and support. I look forward to your guidance.