Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello,
Unfortunately, you cannot merge accounts. So you do need to cancel one subscription and keep the other one.
What type of content do you wish to keep in the cloud? If these are files, you can download them from www.onedrive.com in the account you wish to cancel subscription on, and then upload those files into the OneDrive on the account you would be keeping.