Make sure there is a stable internet connection. more
Firewalls, antivirus scanners and pop-up blockers can also interfere with a download. It may be necessary to configure your firewall and router to allow MyDrive Connect full access to the internet.
If you are trying to download your update on a business network, for example in an office at your workplace, be aware that your company may have download restrictions and access policies that may prevent a map from being downloaded.
Also, if you are using a public network, it could have an unstable internet connection that could cause a download or an installation failure.