I recently installed Mac OS 10.10 (Yosemite) onto an external USB drive. It has been working fine for the past few days. When I need to switch OS installs, I shut down the computer and then pull out the drive. However I think I just pulled out the drive a little too early, while it was still being written to, and now the drive is not being recognized at all by the computer. I get the following message.
Is there any way I can still save the drive without losing all my work on it? Thanks.