Support

It seems that you've run out of free disk space on the target site (where are you restoring to). Can you please check with your host that you have enough free space for the backup and the extracted site?

According to the log file the backup is uploaded. Therefore we don't have a problem with the backup process. The extraction of the archive goes perfectly up to a point where your server responds that it cannot write to a file. If you have enough free disk space on that account the only explanation is that the problem occurs because of file permissions.

Are you restoring on top of another site? If you do, please try deleting all files and folders before restoring the backup.

If that didn't help, Kickstart has three different file write modes. I strongly recommend using the Hybrid mode which is designed for servers with challenging file/folder ownership and permissions. This is the default mode. You must enter your FTP information in Kickstart for that to work.

If you have already done so and you are receiving the error you told me about then I can guarantee that your problem is the lack of free space on your account. In this case you can try something simple. First, delete everything from that target site (files, folders, the backup archive, Kickstart). Do not upload the archive and Kickstart. Instead, extract the backup archive locally, e.g. using Akeeba eXtract Wizard. Upload all the extracted files to the target site. This should work because you are now not running out of disk space (the backup archive doesn't exist and doesn't use up free space!). Now visit http://www.example.com/installation/index.php where http://www.example.com is the URL to your site. This will let you restore your site.