An internal hard drive is connected to the system board of the computer. Unlike an external hard drive, these drives are not portable. Internal hard drives are installed inside the computer. If the external hard drive is not detected, learn how to troubleshoot USB issues on a Dell computer.ĭifference between internal and external hard drives To learn more, see the documentation of the external hard drive on the device manufacturer's website. NOTE: Most external hard drives are connected to a computer using a USB cable such as a USB 2.0, USB 3.0, USB 3.1, or USB-C cables. To learn what type of hard drive is supported on your Dell computer, see the technical specifications in the user guide of your Dell computer for model-specific information. *The type of hard drive (HDD or SSD) that is supported on your Dell computer depends on the hard drive interface (Serial-ATA or SATA, mSATA, M.2 SATA, or M.2 NVMe) that is available on the system board. Depends on the revolutions per minute (RPM) rating of the hard drive.
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