logic x crash

Hi there, Any tech-savvy musicians here who might be able to figure out why Logic has been crashing? Specs: Mac Pro 5.1, Westmere 2 x 2.4 GHz Quad-core Intel Xeon, 64GB RAM OS 10.9.5, 2 HD, 2 SSD in bays with OS on a 1TB, 7200 RPM HD, Writing to the non-OS 4TB, 7200 RPM drive with just...