Hello, I was recently attempting to update one of my apps through the App Store, and the computer was shut off during the installation. Now the hard drive reads "OS X Base System", and only has 6GB of data on the drive. If I go into the drive, I am unable to find my user folder with any of my pictures/documents/etc. I have tried to use data recovery like TechTool Pro 9 and RStudio, but neither are able to find any data. All I see within the drive are folders like Library, System, usr, MacOS install Data,bin, dev, etc. I have tried to reinstall the OS using the recovery partition, but everytime it reboots and says "Cannot continue installation, there is already a version of MacOS or installation media on this disk. Please reboot and try again" I am stuck and not sure what to do anymore. It's almost like the data completely vanished and is no longer retrievable. Regretfully I did not have a backup, so if the data is gone, it is gone. Any advice or recommendations would be appreciated. Thanks!