
Formatting a drive always erases all of the data on the drive. If the USB drive that you want to use as a universal transfer drive contains any data that you want to keep, you’ll need to back up that data onto another disk or a cloud backup service first. RELATED: Why Does Windows Want to Format My Mac Drives? Before You Get Started: Back Up the USB Drive First 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). NOTE: If the above steps do NOT resolve the problem, please back up your data and request a replacement using our online web form.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).

Some older operating systems must have a patch installed before they can use the exFAT file system. NOTE: MacOS 10.6.2 or higher is required for exFAT file system. NOTE: exFAT can be used on flash drives or memory cards to transfer files larger than 4GB. NOTE: exFAT is used on SDXC card (64GB and higher). When finished, the drive will be formatted and repartitioned successfully.

Instructions below are for 10.11.x (El Capitan) and 10.12.x (Sierra)ġ. WARNING: Formatting will erase all data on the device.
