Format external drive: (For Windows 7, 8, 8.1, 10 systems). New purchased external HDD is usually able "gross", that is unformatted, so Windows "sees" as a unit unformatted (unpartitioned), so in My Computer does not appear at all, we have the illusion that disappeared hard disc, so need formatting in NTFS file system.
Quick tip: Formatting your hard disk changes the file system to be compatible with your computer's operating system and fixes non-physical errors in the drive.
Connect your external hard drive on a computer's USB input. If the HDD icon does not appear in My Computer, use the free Disk Management, integrated in Windows.
Disk Management Console appears
To take in possession, you can run the New volume wizard.
To view the result, click on the icon This Pc (My Computer) on Desktop where you can see the new drive. You can restart the computer if necessary.
Quick tip: Most external hard drives are sold in (NT) NTFS file format, which is designed to work with Windows. Ask for more information before buying the external hard drive and format only if necessary.