Home Forums Mac Software Mac Operating Systems I'm back about partitioning

Guys: I read all your input and still cannot make up my mind.

I have Sierra on my extended hard drive now. Can I erase it off the Mac and create more space on my SSD?

Otherwise, I am still confused as to whether it's safe to download both Mojave and Catalina. I have partitioned my hard drive and named the partitions Mojave and Catalina. Mojave has 30 gig and Catalina has 44 gigs. I have not downloaded anything because I am waiting to see what I want to do. I talked to AppleCare and he said the divisions I made are okay. He just wanted to get off the phone, so I came here again.

If I screw things up, can I erase what I've done or is it permanent? I need to do the safest, easiest thing possible if that's the case.

As you probably know, some of what you all said was too technical. Artie was right. Besides, you can see I overthink everything.

Anyway, JoeMike said, "DO NOT let the installer reformat the internal drive to APFS." I don't know what APFS is nor how to not let the installer reformat the internal drive. This is becoming so complicated.