it is not essential.
Most hard drives come from the factory formatted as FAT or FAT32.
you don't need to know what that is other than it will work just fine on your Mac.
FAT and FAT32 can be read from and written to by just about every Operating System out there.
There is usually no software on the drive, out of the box, that is suitable for your Mac.
I'll see if I can find you a step by step, illustrated, guide so that you can format the drive for exclusive use on your Mac.
Hi I'm using macOS Mojave. I'm trying to figure out how to use my external hard drive, silicone power armor a60. I believe I need to format it some how? When I first plugged it in it copied some items on it. They weren't in any order, and many were duplicated or tripled. I started watching a you tube video and got as far as needing to format it. It showed to go to disc utility, click mac, click erase, then he was talking about partitions. It made sense but I should have come to you guys first...not sure why I didn't..so I plug it in and it shows on my desk top. Now what? TIA Melanie