
When completed, the drive will be formatted to the Mac OS X compatible HFS+ filesystem. Smaller external hard drives, SSD’s, and USB flash keys format quickly, while a larger hard drive may take a while longer. That’s all there is to it, the drive will now format and erase everything on it.


Formatting a drive will erase all data and partitions on the disk: This is a simple procedure and is achieved the same way for all drive types and through all connections, be they USB, Firewire, or Thunderbolt. How to Format an External Drive for Mac Compatibility

If you have never formatted a drive before on the Mac, don’t worry, it’s super easy and we’ll walk you through the entire process.
