I have a few of those WD My Passport drives (4TB model). They are good for backups and reasonably fast. I like that they are small so can fit within a fire/flood safe, and don't require an external power supply, so doing a backup is just plugging the USB in, running the backup, then unplugging.
Yep, and once you unplug them you have cold storage of your backup, not susceptible to attack via any network.
Also protection from power surges or lightning strikes (the 99% of the time they aren't connected to the computer).
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