I just got my Macbook here, and I got a USB with Yosemite 10.10.
I opened up the Macbook, took out the old one, and put the SSD inside.
My SSD fits perfectly (Samsung SSD 850 EVO 250GB).
Then I plug the USB thumb drive in, and then boot the computer up, and holding the ALT (OPTION) key down. Then I came into the drives that I can boot from. I couldn't see my SSD there, then I took the thumb drive(8GB), and then I began to install Yosemite, after I choose the language, I need to choose where I need to install Yosemite. The hard drive, didn't show up there either.
I get in Disk Utility and find out that my hard drive, isn't formatted, I just want to format it to Mac OS Extended Journaled, I chose it, and clicked erase and when I did that, I got this error:
Erasing the disk failed, Erasing the disk failed with error:
Formatting the file system failed.
I translated the error from Danish, so it could be worded differently on the English version of Disk Utility.