Greetings!

The cables are standard laptop hard drive cables. One warning, though. If you are running a MarkI, you will have trouble building really large disks from the disk builder image software. This is a known issue where the amount of memory in a MarkI is not enough to create the music filesystem. If you go for a large drive for a MarkI, you might want to add it as a second drive and build it manually, or build it in a Mark2 first. See The Drive Upgrade FAQ for full details on the procedure.