Hi, I have been googling all night and can't find a way to delete or move some files. The varying types of files are in a time machine backup on an external drive that isn't used for time machine anymore so there's a bunch of other stuff on there too. When I attempt to move or delete a file I get the message: The operation can’t be completed because backup items can’t be modified. I've disabled SIP but that did nothing. Any ideas? Help much appreciated!