(1) has two years warranty...
(2) and (3) have 1 year .... I guess (1) is better in terms of reliability/durability ?
I mainly care about reliability/durability...Are there any drives in the same price range with better reliability/durability/warranty ?
For your single instance, 'reliability' doesn't really come into play. A false number.
If the fleetwide stats for WD is better than the fleetwide stats for Seagate...your single instance may be one of the outliers.
ALL drives are subject to fail, no matter what manufacturer.
And inside that enclosure is the same drive as if you bought it as an internal drive.
That Seagate is a regular Seagate Baracuda drive.