Not enough disk space to complete the migration
I'm trying to migrate my catalog to Lightroom CC, and I'm seeing the message "Not enough disk space to complete the migration: Lightroom CC needs enough space to copy your photos and videos before uploading to the cloud".
The photos are all stored on a fileserver, and there's far too many of them to copy to my workstation's hard drive. I tried to work around this by setting the local folder in Lightroom CC to a folder on my fileserver (with the requisite amount of space available), but it doesn't change the situation.
I want to use Lightroom CC precisely because I can't fit these files on my PC.
How can I complete the migration so I can try LR CC out?
In case it's relevant, I'm currently running this on a Windows 10 PC.