Better Yet, easiest way to get rid of all logical partitions and EFI blah,blah,blah... is to use a SeaGate external hard disk Connector and use it to connect the drives. It will pop up for initialisation for sure either on a PC or mac. If it doesn't work on either, you might just have a lemon. If you do get to initialise it in mac, use GPT with Mac OS Extended Formatting. Then plug it into a windows.