I read what you say guys - and Thank You.
However, in the end I think the answer will be cost driven. 100 DVDs cost around £20 and a 1Tb drive is £60-70. My colleague is an invalid on benefits and he will need to take the lower cost option. That said I have some free disk space (as a couple of smaller hard drives rescued from machines that have gone to the tip and now caddy-mounted, and some 50gig of cloud space I never use) and I will offer those as back-up of back-up parking spaces for the more important audio stuff [in my colleagues case that means his Pink Floyd stuff).
The way prices of hardware reduce as the years progress I anticipate that beforfe long (!) a 1TB drive will be the sort of thing to find as a gift in a cornflakes packet or MacDonalds and solid state USB drives will be of comparable size. My colleague can then consider moving his collection back of DVD.
i get what you're saying, but DVD's have a habit of being unreadable sometimes despite them being formatted correctly...
1TB hard drives you can get for as little as £40 if you shop around, ie ebay or amazon or if places have special offers on.
a very quick browse on gogole shopping finds this http://www.google.co.uk/products/catalog...70132544225700#
1TB for £51 or there's the option of 2TB for £85...