Before buying, be sure your system has the small 3-cell battery.  If it has the 6 cell, the hard drive space is taken by the battery. It appears the cable for the 7590 is not the same as for the older 9550/60/70: [URL]  
Dear all,   With reference to the following link, can anyone please advise me whether or not I should purchase this type of HDD cable for the purpose of installing a HDD in my Dell XPS 15 7590, as the cable in this link states that it is compatible with another model of XPS 15: [URL]  I ask this as I cannot find a HDD cable compatible with the model 7590 through Amazon, nor on the Dell store. Thanks!
HDD Cable for XPS 15 7590