I am on Macos Sequoia 15.5. I plugged in a brand new 8TB SanDisk SSD portable drive. I want to reformat it. Diskutility fails in this way: Erasing "SanDisk Extreme Pro 55AF Media" (disk6) and creating "NewDrive" Unmounting disk The volume on disk6 couldn't be unmounted because it is in use by process 0 (kernel) Couldn't open device. : (-69877) Operation failed… I have the drive ejected. I'm used to ejecting a drive, then unplugging it. The first time I tried this, DiskUtility complained that all sorts of processes were using it still, after I Ejected the drive (Bash, simctl, Code Helper, Word, kernel 0). So I closed all the process one by one, until only kernel proc 0 was remaining. Apparently it is not safe to simply eject a drive and then unplug it, as Eject "succeeds" but many processes still have the drive open. How do I format the drive?