That's the worst service I've ever seen. It asks you the size of each zip file and I said 50G at first. And I couldn't download it because the connection was so unstable. No way to resume it and every 20~30 mins, it failed in the middle. Chrome, firefox, safari were all the same. I tried from a GCE VM as well to see if that's my network problem but didn't help.

I had to request again with 2G and I was able to download files finally. But only one by one. And after download 3~5 files, I had to login again as their login expires so frequently.

I had to do that for days and the download got expired. Oh my god. I had to request it again. And you know what? Their file list wasn't deterministic. I had to download from the beginning. lol

I finally made it and I swear I will never use any cloud service from apple.