NTFS is the default file format for Windows and is designed for drives that will be used with Windows computers.įAT32 is an older file format that’s compatible with both Windows and macOS.ĮxFAT is a newer file format compatible with both Windows and macOS.ĪPFS (Apple File System) is the default format for Mac. The most common file formats are NTFS, FAT32, and exFAT. When you format a drive, you’ll need to choose a file format. Once you’ve backed up your data, you can format your drive for Windows or macOS according to the instructions for each system.

Be sure to back up any important files before formatting. Before Formatting Your External Hard DriveĪs we mentioned before, formatting a hard drive will erase all the data on the drive. Formatting a drive for Windows will make it compatible with that operating system, but you won’t be able to use the drive with a Mac unless you format it for that as well. Summary: Choosing the right format for your drive is important if you want to be able to use it with both Windows and macOS. Once you’ve backed up your data, you’re ready to format your external hard drive and use it with Windows or macOS. Keep in mind that formatting an external hard drive will erase all the data on the drive. Warning: Formatting a drive erases all the data on the drive. Most external hard drives come pre-formatted for Windows, but if you’re using a Mac or plan on switching between operating systems (OS), you’ll need to format the drive accordingly to a chosen OS.

Reformatting a hard drive for mac