An
SD card is removable flash memory, much like a USB stick (thumb
drive), it just fits into smaller slots, like in a digital
camera, or phone. SD stands for secure digital.
SSD stands for solid
state drive and is a hard drive based on flash memory technology
just like the an SD card, except it usually holds much more
data. SSD differs from a conventional hard drive. It has no
moving parts, it is much faster and lighter, does not use much
energy, and does not emit heat.
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