So I tried to MIGRATE 1TB of data from OnedDrive to Google Drive, and failed spectacularly: I've set the OnedDrive destination folder to be on an external USB 3.0 HDD (4TB). The hope was that the PC app would download the files, I'll unlink it from the PC, and then upload it to Google. Well, after it finished, I unlinked it, but then - this strange error occurred. Is the hard drive dead? Can I do something to re-instate it to work again? Also, I see this annoying message, even after I uninstalled deleted OnedDrive and Google Drive from the PC. Any ideas?