A Microsoft file hosting and synchronization service.
Hello,
Are you signed in with an administrator account on your PC?
Open File Explorer, go to your OneDrive folder, right click it, select Properties, then open the Security tab and select Advanced. At the top, check the Owner. If it is not your account, select Change, enter your Windows account name, then apply. After that, enable “Replace owner on subcontainers and objects” and apply again. This updates ownership across all files so you gain full control. Restart your PC, then try copying files into OneDrive again.