I'll add my opinion on each tag. But in summary, I say we should get rid of all of them except usb-drive.
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Excerpt:
For questions regarding storage drives that connect using a USB port.
This tag is used a lot, especially since it has 2 synonyms, flash-drive and pendrive. Currently, it has 1315 questions tagged with it.
This one we should keep. -
This tag has no excerpt with 187 questions tagged with it.
I would recommend making it a synonym of the usb-drive tag above. The excerpt of that tag even mentions storage drives explicitly. -
I'm not sure if this tag has any use at all with 101 questions and 0 watchers.
I would recommend deleting it and retagging with usb. -
This tag isn't being used much with a mere 34 questions and 0 watchers. It's mostly used for external devices plugged in through a USB interface. Nowadays, almost all external devices use a USB interface for connection as long as it's not a very old machine or Apple product (which recently is also shitingshifting to USB).
I would recommend deleting it and retagging with usb.