Which one is right for your circumstance? We'll describe them here, and you'll be able to make your choice after reading the details.ĪPFS: This is the default file system in Macs with High Sierra. There are a few file formats you can use, but it depends on the purpose you want to use the drive for. The most important, you should decide which format to use. Part 1: Which File Format You Should Choose?īefore you begin formatting the drive, there are a few things to do.