For women giving birth for the first time, the mucus plug is usually expelled days before labour begins and may often be a sign of early labour. Generally, it is never reason to worry regardless of whether the mucus plug is released early or late.
Hard drive. A hard disk drive (sometimes abbreviated as Hard drive, HD, or HDD) is a device used to permanently store and also retrieve information. There are many variations, but their sizes are generally 3.5 and 2.5 for desktop and laptop computers respectively.
Making the world better, one answer at a time. A hard disk is a type of hard drive; it is the type of hard drive that involves magnetic platters and spinning parts. There are other types of hard drives, namely Solid State Drives (SSDs). These use flash memory, and, true to their name, have no moving parts. hard disk drive is the motor and controller of the hard disk, which is the set of platters and spindle. Various users will use these terms in different or identical ways. T â¦ echnically the disk is just the aluminium or glass disk that is coated with a magnetic surface.