What is it?

 
     Many people may know some basics of a hard drive, but sometimes you may be often puzzled with the question of "what  is it?"  A hard drive is a NVM (nonvolatile memory) mechanism that stores encoded data.  Nonvolatile memory is computer storage that can keep data even when powered off.  Hard drives can be referred to as a couple of different acronyms such as HDD (hard drive disk) and HD, which simply means hard drive.  Early hard drives had removable media instead of today's sealed hard drives.  Media, in this case, basically means objects on which data can be stored.  Hard drives are now sealed disk drives with no removable media.