I have a Macbook Pro Oct 2011 model with El Capitan. I had removed my HDD and installed an SSD in it's place and then I removed my DVD drive and put my 500GB HDD that came with my mac there instead. I never had any problems with it. The 500GB was getting to small so I went and bought a 2TB drive and installed it. I formatted it as HFS+ with GUID Partition Map, but whenever I try to copy larger files it keeps giving me error code -36. I have tried dot_clean on the folder that won't copy and I repaired permissions on the drive, but it doesn't help. I put my 500GB hd in an external enclosure and I can copy my data from that to the desktop, but I can't copy from the external to my new 2tb. Neither can I copy from my desktop to the 2tb. It seems to be fine with smaller files, but larger ones will not transfer and keep giving error code -36.