If your Mac runs out of space, you can use an external hard drive to increase the storage.If you want to back up your Mac data using Time Machine, you need to use an external hard drive to save the Time Machine backups.In many cases, you need to use an external hard drive on your Mac computer. When Do You Need to Use an External Hard Drive on Mac? Best Format for External Hard Drive Mac FAQ.How to Recover Data from an External Hard Drive on Mac?.
