DVR stands for Digital Video Recorder. Obviously the role of the storage devices is to store the recorded video.
A memory card (sometimes called a flash memory card or a storage card) is a small storage medium used to store data such as text, pictures, audio, and video, for use on small, portable or remote computing devices.
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Storing and managing information is an important task of the computer system. Since the information plays an important role in a computer system, its logical and physical characteristics are also a matter of interest as these effect the efficiency of programs using it. Computer system are comprised of input devices, output devices, processing devices, and storage devices. Input devices would include a keyboard, mouse, microphone, sound card (if it uses a microphone), and read-only storage devices. Output devices would include the video card, monitor, sound card, and speakers. Processing devices would include the CPU, and the FPU. The video and sound cards could be considered processing devices, since they also process images, video, and sound. Storage devices would include ROM, RAM, memory sticks, memory cards, the hard drive, and CD/DVD burners.
Processing devices are those devices which are used for processing the computer system. For example:mother board, video card,sound card etc.
A micro SD card is smaller in size and typically has a lower storage capacity compared to an SDXC card. SDXC cards have a higher storage capacity and are generally more compatible with newer devices that support the SDXC format.
memory card
The video card, or the motherboards onboard video output.
SDHC cards have a maximum storage capacity of 32GB, while SDXC cards can store up to 2TB. SDXC cards are more suitable for devices that require higher storage capacity, such as cameras or video recorders. Check your device's specifications to determine which type of card is compatible.
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Your hard drive, video card, NIC etc. Basically any part of your computer but wires can be used by a computer program.
CPU GPU MOTHERBOARD VIDEO CARD SOUND CARD BUSES MEMORY NETWORK CARD CD DRIVE