is a 3.5 or 2.5 hard drive more durable?

[kenny1999]

I am thinking about buying either 3.5 desktop external or 2.5 portable hard drive. Regardless of the price, size and portability, (I can skip using outside), which one is more durable (i.e. less likely to fail quickly , I know it must fail one day)?

 

[Geoff]

I'd say go with the 3.5" drive if your only concern is reliability. Having said that though, I would not consider external drives to be extremely reliable. They are fine for backups or as a secondary storage medium, but never rely on them to hold your only copy of important data.