Gold is a conductor. Most of the more expensive audio cables have gold plated tips because gold is a better conductor than copper.

SATA cables.

There are speaker cables, unbalanced analog cables, balanced analog cables, coaxial digital audio cables and optical audio cables.

There are many ways to keep computer cables from getting tangled up. One easy way is to use twisty ties, from bread bags etc., by winding the excess cords up and then securing with a twisty tie. There are also many products available to purchase that can prevent cables from being tangled up.

There are alot of ways to do this, but check out these 10 tips here, http://lifehacker.com/364054/top-10-ways-to-get-cables-under-control. Personally aim for getting cables that serve purpose, and if you can get it wireless, do so.

A RAID (Redundant Array of Inexpensive Disks) array requires two identical drives, preferably of the same brand, model, and capacity. A few SATA cables are also necessary for building a RAID array. Both drives then need to be installed, as well as connected by SATA cables.