This allows you to have your documents set up so that both computers can use them without you loosing any data. Use a Hardware Solution – An extra external hard drive. It interprets what is on the external hard drive so that your Mac or PC can read and write to the drive.Ģ. Use a Software Solution – You get a piece of software that sits on your Mac. Options For Having An External Hard Drive For Mac And PC Without Formattingġ. And What Do You Do With The Spare External Hard Drive When You're Done?.Options For Making An External Hard Drive For Mac And PC Without Formatting.How Much Do You Want To Spend On The Problem? Which Computer Are You Planning To Use Your External Hard Drive Most On? Before You Decide How You're Going To Fix Your External Hard Drive For Mac And PC Without Losing Any Files.So, What Is The Issue? Why Doesn't My External Hard Drive Just Work?.