![]() ![]() This disk preparation setup process is called " formatting. Below, we'll show you how to set up a USB drive as exFAT for both Windows and Mac. That file system is called exFAT, and it's designed for flash media cross-platform compatibility. If you're frequently using both Macs and PCs with the same drive, the ideal solution is to configure a USB drive with a file system that both operating systems can read. And likewise, if you format a USB drive as NTFS on Windows, Macs can read it but not write to it (although there are some ways around it). Related: What Is a File System, and Why Are There So Many of Them?So here's the problem: If you format a USB drive as APFS on a Mac, Windows 10 won't read it without third-party tools (and will actually ask to format it). Windows 10 uses a file system called NTFS, and macOS currently uses APFS by default. A file system determines how an operating system writes data to a hard disk or a USB drive. If the Security Options button is not available, Disk Utility cannot perform a secure erase on the storage device.Windows 10 and macOS use two different file systems by default. Secure erase options are available only for some types of storage devices. (Optional) If available, click Security Options, use the slider to choose how many times to write over the erased data, then click OK. ![]() For the best result, select the disk (the highest option in the external tree). You can find this on the left-hand side of the screen under External Hard Drives. Click the external hard drive you want to format. If the Scheme pop-up menu isn’t available, make sure you selected the storage device you want to erase-it’s at the top of the hierarchy.Ĭlick the Format pop-up menu, then choose a file system format. Then click View in the top-left corner of the window and select Show All Devices. ![]() Ĭlick the Scheme pop-up menu, then choose GUID Partition Map. In the sidebar, select the storage device you want to erase, then click the Erase button. If you want to erase any other type of storage device: Double-click Disk Utility in the /Applications/Utilities folder. Note: If you want to get your Mac ready to trade in, sell, or give away, and your computer is a Mac with Apple silicon or an Intel-based Mac with an Apple T2 Security Chip, use Erase Assistant. ![]()
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