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How hard disk works
The Hard Disk is the place in your computer where data is stored long term. The name 'hard disk' was adopted to differentiate it from the 'floppy disk' (which in the early days really was floppy!).

The hard disk in the pictures below has had the casing removed so you can see inside. The hard disk pictured is a Hewlett Packard with a storage capacity of 340Mb which was probably state of the art around 1992 / 93.

Today's typical hard disk has a storage capacity of 500Gb - that's well more than 1500 times more storage than back in 1992/93.

The interesting thing is that the physical dimensions have not changed despite the overwhelming increase in storage.
What you can just see in the pictures to the above are two shiny discs (called "platters"), one sitting on top of the other. Hard disks may have two or more shiny discs (referred to as "platters"). The device that sits above the disk is the arm, on the tip of which is an electronic device that can either impart or receive electrical charges to and from the magnetic surface of the disk. Since there are two platters in this hard disk, there are in fact two arms (one for each platter).

When in operation the arm moves across the surface extremely fast. It works so hard that eventually, probably between 3-5 years it begins to malfunction and cause micro damage to the surface of the disks. Then your hard disk begins to report "bad sectors".

Hard drives for laptop computers are much smaller and moe susceptible to damage due to the nature of laptops and notebook computers being frequently moved around. Vibration caused while the computer is actually in operation is not good for the hard disk. Therefore shutdown your laptops before you move them.
CPU-Z is a freeware system profiling and monitoring application for Microsoft Windows and Android that detects the central processing unit, RAM, motherboard chipset, and other hardware features of a modern personal computer or Android device.
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What Is a Throwaway Account?

A throwaway account is a temporary account used for a specific purpose—not your main Reddit account. Your regular Reddit account might include your name or make you identifiable through your posting history, and that can be limiting. If you want to be able to ask a question or leave a comment without anyone knowing it’s you, you need a throwaway account that can’t be identified.

Reasons to use a throwaway Reddit account include:

Discussing financial matters
Speaking about personal or embarrassing problems
Asking questions about working with an employer
Any subject where you want to discuss something freely without being identified
Even if you usually use an alias online, you might want to post sensitive things using a throwaway account. Internet detectives won’t be able to go through all your comments and find clues to figure out who you are.

Remember, an account that isn’t identifiable doesn’t protect you from saying something that can be used to figure out who you are. Be careful what information you share.

The term “throwaway account” is also used for other types of accounts online, from email and social media to online gaming. It’s any temporary account that isn’t your main account.
How to Create a Throwaway Account on Reddit

Reddit accounts are free, and there is no limit on the number of accounts that you can create.

You can stay signed into your regular Reddit account while you use a throwaway account if you like. Just open a private browsing (incognito) window, launch a different browser, or use another browser profile.

Visit Reddit and click “Sign Up” at the top of the page. If you’re already signed in, you’ll have to sign out first.
Enter a username and password. The username can be anything so long as it is unique but don’t choose a username that you’ve used elsewhere. Be sure to select a username that isn’t associated with your regular Reddit username. Some people even put “throwaway” in the account’s name.

You don’t need to enter an email address to create an account—more on that later—but you must tick the CAPTCHA box before clicking the “Sign Up” button.
Enter a username and password. The username can be anything so long as it is unique but don’t choose a username that you’ve used elsewhere. Be sure to select a username that isn’t associated with your regular Reddit username. Some people even put “throwaway” in the account’s name.

You don’t need to enter an email address to create an account—more on that later—but you must tick the CAPTCHA box before clicking the “Sign Up” button.
Deselect any subreddits that have been selected for you and click the “Finish” button.