In the past, I have used the Chromebook utility to create a recovery image USB. This time, it hung at 0% on writing to disk. I tried with two different USBs. Then I started searching for a workaround
A reddit post led me in the right direction. This URL downloads a conf file with the direct URLs to download the image for each Chromebook. I searched the file for my model (Acer Chromebook 15 (CB3-531)) and downloaded the zip file. It was about the size of a CD (655MB)
Then I chose the gear and the local image option. I picked the bin.zip file. It still wouldn’t load. I wound up just copying the zip (and the unzipped cpgz) to the USB. (still under 3GB). That way I have it in case it is needed. My mother would have to bring the ChromeBook to best buy anyway so they can make the recovery disk if needed. We’ve never needed it so I don’t expect to!
I’m now wondering why it needs a 8GB disk when the image is far smaller. i also note that in 2012, it said you needed an 8GB disk and i used a 4GB one. So inflation?