Hello, I am trying to create a boot drive on an external NVMe using the APFS format. It is an SSK enclosure (this one) with a 2tb western digital blue drive. I am using a macbook pro 13,3 and used Carbon Copy Cloner to make a copy of my current osX 10.14.6 install in the external. The drive doesn't seem to show up when I boot the computer unless I unplug it and plug it back it in. Unfortunately if I do this on the drive selection screen when trying to boot from an alternate drive, it just freezes the screen. This is the second enclosure I am trying this with with the same affect. Wondering if certain enclosure just don't work for this? Maybe someone knows one that does? Or even better a way to make it work with the SSK? I have also tried selecting the external from the startup disk options in System Preferences to no avail. Thanks!