A while back, my university supervisor shared a Sharepoint folder with me which I synced to my PC through OneDrive for Business. The folder has since been unshared with me as I am not working on this project anymore. However, the files that were synced to my desktop are still there and I am unable to delete them.
When I tried to delete the files I was told I didn't have permission and required administrator access. I have admin access on my computer but this did not work. I tried going into the Advanced Security settings and have set myself as the owner of the folder yet I am still unable to delete it. Now it tells me I need administrator access, I click OK to that and it tells me I require permission from my own account but only have options to retry or cancel. How can I delete these files?