Lightroom Downloader Disk Space

Hi, I've just installed the downloader, I've got 75Gb of pics etc in Lightroom cloud which it analyses and tells me file types etc and I've got over 1Tb of free space on my local hard drive. Problem is any folder I choose on local drive it says there's not enough space. I've tried creating a new temp drive but always get the same answer. Any help greatly appreciated

Simon