Deleting a file on a computer rarely means it is gone. On traditional hard drives and many solid-state drives, what disappears from view often lingers in the background, recoverable with the right ...
The disk in question is disk04 - a 128 GB SSD drive in an external USB enclosure. I booted the Macbook from a X.11 USB install drive and there was an internal SSD drive as well. a simple fdisk ...
If the drive is relatively newish, it should support the ATA Secure Erase function. If so, use the manufacturer utility or another utility that supports ATA Secure Erase and it will wipe the drive ...