In the UK, and I believe this is common in other EU countries as well, that doesn't matter. Durability is an implied term of the contract, and in most cases (buying a hard drive as new) it's hard to see how lasting 6 months would be sufficiently durable.

> The quality of goods is satisfactory if they meet the standard that a reasonable person would consider satisfactory [...] The quality of goods includes their state and condition; and the following aspects (among others) are in appropriate cases aspects of the quality of goods [...] durability.

http://www.legislation.gov.uk/ukpga/2015/15/section/9/enacte...