Overwrite the entire disk with zeros (dd)
dd if=/dev/zero of=/dev/sdX bs=512 status=progress
Writes zeros to every 512-byte block on the specified disk (/dev/sdX), effectively wiping all data, including the partition table and file system
dd if=/dev/zero of=/dev/sdX bs=512 status=progress
Writes zeros to every 512-byte block on the specified disk (/dev/sdX), effectively wiping all data, including the partition table and file system