I recently purchased an external SSD by Transcend that can connect via thunderbolt 2 or USB 3.0. The USB connection works well enough but for some reason I keep losing contact with my thunderbolt connection (It won't work at all on my friend's macbook). Is my SSD a factory defect? All my cables and ports look normal to me though. Or is thunderbolt particularly sensitive to corrosion from humidity because I live near the sea? Has anyone had any similar issues with Thunderbolt?