I buy mine from OWC…their enclosures seem to be better built and I’ve had very few problems with them. I typically get the enterprise drive version that costs a bit more because those drives are supposed to last longer in 24x7 operation. For main drives…go Thunderbolt but for everything USB (even the older A type) is fine for backups. All my backups except BackBlaze happen via CarbonCopyCloner tasks overnight and only the first one takes very long anyway.I am planning to add another 20 tb single hard drive for second local backup.
Is there some recommendation on a particular brand?