Hey everyone, My original hard drive went bad in my 2013 Macbook Pro 13" and I just replaced it with a Samsung 8500 Pro. At first the Samsung didn't show up as on option to Reinstall OS X. I went into Disk Utility and selected the Partition Tab, chose 1 Partition, named it, selected OS Extended (Journaled), and under options changed it to GUID. Then my new partition showed up on the left. I went back to the recovery window and chose to Reinstall OS X. It installs for about 30 mins and then automatically restarts. When it restarts, the question mark folder shows up, then I'm stuck... I also tried the recovery option using my Time Machine external drive, but that fails about 2 mins in to the process. In Disk Utility I clicked Verify on the new partition of my Samsung. It failed and in Red it says: Invalid b-tree node size. I'm stuck! Any help would be greatly appreciated! Thanks!!