About this interactive
Removable media are storage you typically plug into a computer, store data on, unplug and take somewhere else. Almost anything can be removed if you open the case, so the test is how the storage is normally used.
A USB flash drive slides into a USB port. You save files to it, unplug it and take it to another machine, which makes it the everyday way to move a few files between computers.
An SD card, or the smaller microSD card, goes into a card slot: cameras, drones, dash cams, handheld consoles, phones. A microSD card can sit in an adapter to fit a full-size SD slot.
An optical disc (a CD, DVD or Blu-ray) goes into an optical drive, where a laser reads it. You can eject it and take it to another computer or player. Pressed discs are read-only, so a disc suits copies people should play but not change.
Backup tape is magnetic tape in a cartridge, or cassette, that goes into a backup device. It is the medium of a backup system: the cartridge is loaded, written, taken out and stored.
Not removable: the drives inside a computer, such as its SSD or hard drive on a SATA cable, or an M.2 drive on the motherboard. They are not typically moved from place to place. The lesson shows the exception: put an SSD in a USB enclosure and it becomes removable, because now you do unplug it and carry it.
So look for the clue: a USB port, a card slot, a disc, a backup system, or storage that lives inside the machine.
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