A Microsoft file hosting and synchronization service.
Hello,
Thank you for coming to the forum. My name is Fuad, and I'm happy to help you in the best way I can.
Note, I am a user like you, this is a user forum and not Microsoft directly.
That message is because you have OneDrive still running on the device, you need to unlink it.
But please nothing beats, doing a backup to an external drive (or flash drive). After your backup is done, unlink the OneDrive, then do the factor reset.
Unlink OneDrive Click the OneDrive Icon on taskbar > Click settings (gear icon) > go to the account tab > click unlink this PC
Click the link below: https://support.office.com/article/3c4680bf-cc36-4204-9ca5-e7b24cdd23ea
I kindly await a reply for a follow-up
Best Regards Fuad