[NiLuJe]

And because apparently this bears repeating: macOS's handling of archives is terrible.

First, don't let Safari unpack everything automatically for you, that'll most likely be more of a hassle than anything (c.f., first screenshot).

Second, don't let your GUI unarchiver do anything too smart, like unpacking stuff in a subdirectory, that'll obviously be counter-productive here. (c.f., second screenshot, from The Unarchiver's settings).

Third, unless you went to a lot of trouble to make it do what you want, be aware that you will NOT see the two hidden folders (.adds & .kobo) found in the zip and on your Kobo's storage in Finder. But, you can use the wonderful Command+Shift+G keyboard shortcut ("Go To") to manually enter the location you want to browse to, hidden folders included.

EDIT: You can also temporarily toggle the display of hidden files in Finder with the Command+Shift+. shortcut (which may translate to Fn+Command+Shift+whatever base key . is on in your layout, i.e., Fn+Command+Shift+; on an AZERTY keyboard. Yes, Apple's AZERTY layout is utterly braindead.).

(You can also simply avoid most of this pain by firing up your favorite Terminal app and just use unzip on the CLI).