Because of the number of tracks and file sizes, it’s best to download collections and entire works from the Qobuz PC/Mac applications
Once you have downloaded the app:
Go to www.qobuz.com
Click on your name in the top right of the screen
Click on “My profile”
In the “My Music” section, go to the “My Purchases” tab
Click on “Access Download” next to the item in question
Then click on “Download with Qobuz for Mac/PC
I haven’t found an answer to my question: contact our customer service team.