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Re: WD 320 GB shows only 300 GB of usable space
There is no additional 20gb. This is because the manufacturer (WD and the others) express drive size in the decimal (base 10) system. Windows formats the drive in hexadecimal (base 16), which is really ramped up from binary (base 2), which is what computers actually use.
So, 320gb decimal actually equals 300gb, as far as the computer is concerned.
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Hold the Windows logo key on your keyboard and press "R" (Winkey+R). This will launch the Run the utility. Type "diskmgmt.msc" inside the text box and press Enter. This will open the Windows Disk Management utility. This is where you can format, create, and delete hard drive partitions. order to create a partition, you need unallocated space. Unallocated space is basically disk space that is not formatted or not prepared for storage. Formatting is the act of preparing a disk space for storage. It similar to building a foundation for a place to be inhabited. Thus, unallocated space is just useless blank space with no "foundation" or format. To create unallocated space, you need to shrink your hard drive. When you shrink your hard disk, the remaining space becomes unallocated. To do this, right-click your main drive and select "Shrink Volume." You will then see the region of unallocated space (shaded black). Remember, this space is not yet usable. Now you need to create "foundation" or format for the unallocated space. This will allow for the space to become usable. Right-click the region of unallocated space and select "New Simple Volume." This will launch the New Simple Volume Wizard. This will guide you through the installation process. ssign the disk a drive letter. You can choose any drive letter that is not currently in use. Select a file system for the disk. The file system is basically the type of format or "foundation" the storage device has. If you plan on installing a Windows OS to the partition select the"NTFS" file system. Name the partition in the "Volume Label" text box. You can choose any name for your partition. Now click "Finish" to create the new partition.
Maybe you can try to format it to see if you can get the space back. But one thing important is that you may need to backup your files first. If not, you may lose them. Or you may try some file recovery tool after you format your drive. This may be help, I've try it, workable. http://www.uflysoft.com/data-recovery-mac/ Hope it can help and hope you can get back your 320G back.
Make sure that in the computers bios, the SATA port is enabled, and that all the cables are properly connected, if the drive is brand new it needs to be first Partitioned and then formatted for it to show up in your "my computer" or computer folder.
Most commonly, 297 GB is the formatted capacity of the 320 GB hard drive. You can check if there is any unpartitioned space left on your hard drive. Right click My Computer, click Manage, click Disk Management, locate the hard drive which shows 297 GB (a big reactangle). If this rectangle is all the way from left to right, everything is fine. Else it will also show another rectangle next to it as Unpartitioned space which you can format and use.
Every time windows tells you to format the drive, copy your data to your computer then format it. when windows detect problems on the drive, it will launch ckdsk, well i dont know hoy to fix it, try plugging it in then reboot.
It has to do with the way computers count. Computers count in binary where we count in decimal. Hard drive makers list there drives capacities in the decimal format, where windows lists it in it's binary format. Wikipedia has a good explanation.
Also, the drive may have some preinstalled software on it that could be taking up a bit of space (it's usually not much).