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.
Determine your hard drive's classification. Hard drives come in two main sizes--3.5 inch, and 2.5 inch--which are technical classifications that refer to the width of a hard drive's platter (the disk that stores your computer's memory), but not the full dimensions of the hard drive unit itself.