Mac OS X saves data using HFS and HFS+ (Extended and Journaled) file system; like all other platforms, Mac users also face data loss, some of the most common causes for data loss which are supported at our Labs have been indicated below.
What are the Symptoms of a Data Device Failure?
Your data device might be displaying any one of the symptoms listed below. This can be due to physical damage to the storage device or logical corruption to the file system or operating system. Below, we have listed many of them.