Mac OS Extended (Journaled) is the normal recomended way to format your drives, internal and external.
Moreover, all mechanical drives should be formatted using Mac OS Extended too. So, if you have a drive which is to be used with Macs running on earlier versions of Mac OS than macOS High Sierra, then you should only format it using Mac OS Extended. Thus, Mac OS Extended is the most suitable file system to be used for formatting backup drives.MS-DOS File System is the older FAT filesystem used with MS-DOS and Windows. Mac OS Extended (Case Sensitive, Journaled) is HFS+ with a combination of case sensitivity and journaling.Not only this, we will help you pick the best file system for your usb flash drive that you are planning to use on a Mac. This simple guide will teach you How to Format a Flash Drive on Mac.
