Hi,
I have a new 2017 iMac 27" 5K 3.5Ghz 1TB Fusion drive. I added a 500GB M.2 SSD in a USB-C to USB-C External Housing as the the boot drive. It's certainly made a difference in performance.
However, the Fusion Drive has a Windows 10 partition (Boot Camp) and 750GB of free space.
I am just...
I have a new MacBook Pro running OS X High Sierra 10.13.6. I've hooked up a Time Machine external 5 TB hard drive. It's been backing up the Macintosh HD (why do they call it a HD when it's a SSD?) but does not back up a LaCie 5 TB external hard drive. I can tell that by the Time Machine message...