So how do external hard drives work?

Like... are they like SD cards and USB flash drives where you just store files on it and then can just view them from any device you plug them into? The thing is I need a LOT of storage. Like 2TB. But I’m having a hard time finding any flashes or sd’s that hold that much and these external hard drives keep popping... show more Like... are they like SD cards and USB flash drives where you just store files on it and then can just view them from any device you plug them into? The thing is I need a LOT of storage. Like 2TB. But I’m having a hard time finding any flashes or sd’s that hold that much and these external hard drives keep popping up. I need something I can keep files on like media and stuff and view from two different laptops one at home and one at work.
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