Need to create a Master Boot Record so my Win XP computer will recognize My Passport (1 TB). My Win 10 machine does not have the option to “Convert to MBR Disk” in disk management. The Win XP disk management recognizes My Passport, but does not assign it a drive letter, assume because it is a GUID (?) format.
personally i use AOMEI Partition Assistant Standard Edition [FREE] which can convert GPT to MBR without data loss.
once converted to MBR then you can use it on WinXP & Win10