Was it a mistake to buy WD MyCloud Drive

You seemed to have dated info and haven’t read the development in the last 2 to 3 months which WD has emailed each account holder several times. It has been possible since that time to enable local access and allow local operational control over all user data without any connection to the internet. In addition, it is also possible with additional software to allow remote operation of the My Cloud Home independent of WD servers, which means for some who installed such software, the fact that WD servers are down means nothing - the My Cloud Home remains completely functional.

Enabling local access required authentication during normal operating condition, requiring operational WD servers which is not possible right now because of the security breach in which WD took preemptive actions.