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Installer should let you choose installation drive. Best practice is to default to C: drive but have option to install to another drive.
Installer installs to C: drive with no options to change this
Tested on Windows 10
It would also be nice to be able to configure the storage location for images/volumes - if this is possible I haven’t seen the option anywhere.
Absolutely, changing where the app is installed to as well as the location of images. I run a m2 ssd for main and raid-0 ssd’s for my vms. (I’m sure we aren’t the only devs with setups like this).
Ditto.
I’ve tried installing the MSI and explicitly specifying the target directory (msiexec /i InstallDocker.msi TARGETDIR="D:\Docker" /qb)… I just end up with an empty D:\Docker, and the rest of the files still end up on C:\.
I have Hyper-V configured to put its VM hard drives on a different drive by default, and the VM Docker creates does end up where I wanted it - but Docker’s program files are still on C:. I guess that’s close enough for me, but I’d like some confirmation - is Docker actually storing everything on the MobyLinuxVM VHD?
Edit: For that matter, it’d be nice to be asked about the VM settings before it got created - my naming convention’s been messed with.
I agree,
Having an option to choose an installation location is critical. Please add this! 
Same here. Will I be able to choose the installation directory somewhen soon? Thanks.
Found a work around of sorts.
Haven’t fully tested, but it looks like it installed to the right spot now and not defaulted to C:\ drive.
Thanks giroux7103. One extra step for me was to change the PATH environment variables to ensure that docker binaries were pointing to new drive (D:\ in my case)
Any one want to explain for the layman?