Thank you for your reply and your cooperation.
I am glad to confirm that these two models (WD122KFBX and WD121KFBX) are indeed Air based models.
There is a spelling error on the Data Sheet, as Aria is supposed to say Air. We apologize for this confusion, and we will work on getting this updated.
If you have any further questions or your issue is still unresolved, please reply to this email and we will be happy to assist you further.
Alternatively, you can start a live chat or a phone call with one of our support specialists by clicking on the following link:
Chat:
https://support-en.wd.com/app/chat/chat_launch
Phone:
https://support.wdc.com/contact_phone.aspx?lang=en)
Sincerely,
Logan K
Western Digital Customer Service and Support
https://www.westerndigital.com/support