A Microsoft file hosting and synchronization service.
I understand why you would prefer someone to look at the computer directly. Please do not delete any of the duplicate folders yet, because one may contain files that have not finished syncing.
First, sign in to OneDrive on the web and confirm that your important files are there. The supported method for moving OneDrive to another drive is to unlink OneDrive, move the folder, and then link it again using the new location.
Since sorting out duplicate folders remotely is beyond what someone in this public forum can safely do, I recommend contacting Microsoft Support through the official support page and explaining that OneDrive was moved from C: to D: and now shows duplicate folders and a file-size error. They can advise what support options are available for your computer.
For your safety, only allow access through official Microsoft Support, and do not accept unsolicited calls offering to fix the computer.
Please note that this is a user-to-user support forum. Moderators and contributors cannot access accounts or Microsoft’s back-end systems. We can only provide technical guidance on reported incidents, requests and ideas
I hope this helps, please feel free to give me any updates