7
Only APFS is supported for running Catalina. There may be some weird workaround for running Catalina on HFS+, but I don't know of any.
4
Pedro has already correctly answered your question. This answer addresses your statement of improved performance. The internal fusion drive is basically a SATA HDD and a PCIe SDD. While your 1TB Samsung T5 SSD drive will be faster than the internal HDD, it will not be faster than the internal SDD. The reason for this is the T5 uses a USB 3.1 Gen 2 interface ...
2
A nice leightweight monitoring tool is bwm-ng (installed with brew):
It shows network as well as disk activity:
$: bwm-ng -i ioservice
bwm-ng v0.6.2 (probing every 0.500s), press 'h' for help
input: ioservice disk IO type: rate
/ iface Rx Tx Total
============================================...
1
There is a third party solution to this and it's freeware. But what it does is backup your entire user profile and then restore it on another PC.
I have been using the ForensIT TransWiz to migrate people from one computer to another. I did a whole bunch of Windows 7 to Window 10 migrations and as long as all you need is located in your user profile folder (...
1
Why do I have to clone the internal drive to an external drive and then reboot from the external drive? What does this accomplish?
Technically, it allows you to re-partition and format your internal drive as APFS because you can't be mounted to the drive/partition you want to modify. Booting from the external drive allows you to modify the internal drive.
...
1
A popular disk speed testing tool is "Blackmagic Disk Speed Test". You can download this from the App Store and get quantitative measurements for your new SSD.
1
It seems you're not using the standard rsync program that comes with macOS, but rather a different version from for example HomeBrew. In that case you'll probably want to use the --acls option to ensure that proper ACLs are being used.
The "operation not permitted" even as root seems to indicate that you're running Catalina, and haven't given the program ...
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