The hard disk is a 1:1 copy - everything is exactly the same as the original hard disk. The PC should not notice any difference.

The production date... The silver one is the predecessor version, the range of functions is the same and both have USB 3.

Hello, yes

Bonjour, Capacité disque dur 2x jusqu'à 3 TB https://www.nikktech.com/main/articles/peripherals/hdd-enclosures/437-raidsonic-icy-box-ib-120cl-u3-hdd-docking-clone-station?showall=1&limitstart=

yes, that's right

it works fine for me with the mac (osx el capitan)

If you want to make a hard disk copy, it does not matter whether the target hard disk is empty or full, the target hard disk is always quickly formatted first. The reset button is only used to reinitialise the hard disks and then they can be seen again on the PC, for example. Maybe you can see here some more data about what this great thing can do. https://raidsonic.de/products/external_cases/hdd_ssd_docking/IB-120CL-U3/pdf/datasheet_ib-120cl-u3_d.pdf Kind regards Patrick