More parts, like a case, indicators and a power supply.
Modern disk drive construction more or less requires drives to have at least one partition. Whether the drive is internal or external is immaterial.
An internal modem consists of a card that is installed in the computer, it has no additional wires or hardware. An external modem is more expensive to produce because, in addition to the card, there is the plastic housing that contains it, indicator lights, and cables to connect it to your computer.
can some one write the reason for why external or internal?
As compared to an internal floppy drive? You have to include a case, power supply and USB software in order to make them work.
Internal storage of a computer means the memory type that resides inside the computer primarily the internal hard disk drives (or more modern solid state drives). External storage devices include the USB memories, External or network storage drives on which data is stored outside the main computer body.
It depends on your needs, but internal drives will be cheaper and more reliable.
Why are there generally more eggs and sperm cells produce during external fertilization thean internal fertilization
The internal obliques are muscles located underneath the external obliques. The external obliques are more superficial and run diagonally on the sides of the abdomen, while the internal obliques are deeper and run perpendicular to the external obliques. Both muscles help with twisting and bending movements, but the internal obliques also aid in breathing and trunk stability.
External drives require additional controllers to adapt the signals to the chosen interface. The drives themselves are manufactured as ordinary IDE or SATA drives, and are simply placed in an enclosure. The enclosure adds a great deal to the cost. Another factor is that external drives are more prone to damage, so the company may need to charge more to offset RMA costs.
no it i very rare
Vernier calipers is more convenient to use compared to the external and internal calipers because vernier caliper by its own could be used as external and internal calipers. When using Vernier caliper you can identify the measurement withtout using ruler, meter stick etc. but the internal and external calipers rely on measuring tools to know the exact measurement... (*Ivan Richmond Jumawan*).
An internal variable will change due to computations in the program module. An externalvariable will change due to other changes (external input).