- [Instructor] There are several hard drive specifications
you should know for the exam and one of those is capacity.
The capacity of a drive is the total amount
of data that can be stored on that drive.
Examples include 250 gigabytes, 500 gigabytes
one terabyte, two terabytes, four terabytes, and beyond.
You want to be able to find out what the capacity
of your drive is and you can do that in two ways.
In Windows, first we can go to "File Explorer"
or "Windows Explorer" in older versions of Windows
and go to "This PC" and you'll see your different volumes.
That doesn't necessarily mean a drive
because a drive can be broken up into separate partitions
or volumes, but here's one the G volume,
which is a single drive.
So we'll take a look at that by right clicking on it
and going to "Properties".
And then we'll see here, the capacity,
the total capacity for that drive gives you a big number
but it's essentially a 500 gig drive.
There's a discrepancy there and I'll talk about that
in a moment but you wanna be able to take a look
and find out the basic amount for the drive.
This is considered to be a 500 gig drive.
You also wanna be able to read this little chart
and see how much space is used and how much is free.
Now in a previous video I mentioned,
I like to keep my drives 50% clear,
and that's not always possible.
As you can see here, I only have about 80 gigs left
on this particular drive 'cause I'm recording so many videos
but I will be clearing it out soon.
And this is one of the reasons you go and check.
So you can tell the used space is blue,
about 400 gig.
Free space about 80 gig and the total capacity
for the drive.
But you also want to be able to view this
within disk management.
And so if we bring up the "Run" prompt
to get to disk management, easy way to do it,
go to "Run" and type D-I-S-K-M-G-M-T dot M-S-C
and that'll load up the disk management tool.
And this way you can see the actual disks you can see,
they're not really disks.
These are all solid state drives
but you can see the actual drives as well
as the individual volumes.
See, for example, disk zero,
this drive is broken up into multiple partitions.
We've got the C drive, which is, C volume I should say,
which is 145 gig.
And we've got the E volume, which is 86 gig.
And then we have our recovery sections here,
our recovery partitions.
But that G volume that we saw,
that's just inhabiting the entire drive,
this other drive here, which is a M.2 drive.
And that's what we have here.
We've got a solid state, S A T A 3.0
and we've got a solid state M.2 right here.
So you wanna be able to view that information,
see the total size of these drives here
and then break it down by the partition or volume.
And you can see those volumes here as well
and see the percentage free for each of these.
So look at the C volume only 20% free
and the G volume only 17% free.
So I've got some work to do there
and I've got a lot of backup to do.
Backup stuff to my NAS box and to archival as well.
So you wanna be able to check those things
within "File Explorer" and "Disk Management".
Now hard drive manufacturers go
by the base 10 numbering system,
meaning that there are 1,000 bytes in one kilobyte
and here's the full name, kilobytes.
One kilobyte, KB, has 1,000 bytes
and this is technically and mathematically correct.
So if you look to purchase a drive, it'll say,
hey it's a 500 gigabyte drive and you buy it.
However it's measured differently
in Windows and other operating systems.
Programmatically and from an operating system standpoint
we use the base two system and the name
actually changes here.
Instead of a kilobyte what we're dealing with is a kibibyte
and that's K-I-B where there is actually 1,024 bytes
in this unit of measurement here.
This kibibyte, which some people may still call kilobytes.
And the image on the right shows an example of this,
even though it does use the base two system,
Windows still refers to these as kilobytes,
megabytes, and gigabytes.
And so you get a discrepancy here.
Instead of this showing up as 500 gig,
it shows up as 476 gig or you might see it as 465 gig,
it depends.
So that's a little phenomenon.
You're not losing any space.
It's just how Windows interprets it compared
to what the hard drive calls it.
Same amount of space though.
And I actually have a video that describes this phenomenon
a bit further on my website and this is the link for it.
But for now you should know how to find out
the maximum capacity of a volume or a drive in Windows.
For example in "File Explorer" and in "Disk Management"
and be able to read and understand
how much free space you have available.
So a little bit about hard drive capacity.