Best format for external disk?
I have a 2017 MacBook Pro with a 256GB SSD (Apple) installed. Not a lot of space, so I have and external 1TB SSD attached (USB3.1) with many programs and all my data on it. Currently this disk is formatted Guid-HFS+. Is there any advantage to having this SSD formatted as APFS. This disk is NOT bootable and its backup clone is a 1TB partition on a 2TB spinning drive (HFS+). Your thoughts are appreciated.
Also, is it OK for the clone of the boot SSD to be on a spinning APFS drive or is it best on an SSD? I'm guessing SSD. Thanks.
MacBook Pro, OS X 10.11