6tb thunderbolt3 link to Lacie 2tb USB MicroB

G-Technology G-DRIVE
1

Hi. I am new in G Technology products ( normaly use Lacie and WD). I want to do the following set up and would appreciate comments/experiences.
iMac 2020 connected to G 6tb Thunderbolt3 (3 partitions); partition A w/ 2tb for iMac backup using Time manager, Lacie 2tb ( USB micro one side USB A other side) connected to G 6tb on USB C to mirror the iMac backup on 6G partition A. My objective is to ensure a compete mirror backup on a protable drive. Other option is to use time manager for double backup in each drive, but that way I assume I may lose assurance of being 100% equal.Thanks