m not familiar with 7 interface let alone 8 as i have left using them long time ago...
one thing is you can try recovery software to try and recover the data..
well got this suggestion from other site that could apply to your case if i m not wrong.
TestDisk is OpenSource software and is licensed under the terms of the GNU Public License (GPL).
TestDisk is a powerful free data recovery software! It was primarily designed to help recover lost partitions and/or make non-booting disks bootable again when these symptoms are caused by faulty software, certain types of viruses or human error (such as accidentally deleting a Partition Table). Partition table recovery using TestDisk is really easy.
*www.cgsecurity.org/wiki/TestDisk
havent use the above software myself so i m not sure it will serve the intended functions
i myself use EASEUS data recovery wizard..
i also declare that i m not an associate/employee of or have a financial interest in EASEUS.