No matter which operating system you use, all the storage devices (including internal and external hard disk drives, zip drives, CDs, DVDs, pen drives, and many more) are prone to errors and data loss. This could happen due to any reason, like, unintentional or intentional drive formatting, unexpected power off leading to sudden closure of the operating system, accidental deletion of important system files, partition or its file system corruption, operating system error, some bugs, corruption or damage to the storage media, read/write error messages, and many more. But handling all these problems is fairly easy, if you have a backup of the data. But in case you don't have it,
hard drive recovery software can aid you in your endeavor for it...