You can use your HFS+ external disk for a Time Machine backup. Here again HFS+ is the best choice because it gives you the widest options on your formatted hard drive. Best Format For External Hard Drive Mac Catalina Or you plan to share your SSD with a windows computer. The exception to this is if you plan to share your drive with an older Mac running Sierra or earlier. As long as you don’t intend to use the drive for Time Machine. You can use a HFS+ formatted disk as a backup disk for Time Machine.īut if you’ve an external SSD.

Best Format For External Hard Drive Mac Catalina.Best Format For External Hard Drive Mac Big Sur.