A .psd error message?

I have a .psd file that is getting this error message "Could not complete your request because it is not a valid Photoshop document."
This is the first time this has happened on my Ps, CS6...and I've looked elsewhere to get some help.

And I was just working on this file a while ago, so I'm not sure what went wrong.
It is located on one of my USB Flash Drives, and I have heard that certain USBs tend to cause these things....yet this is the first its happened. How to do recovery for photoshop?

rickharris2 months ago

If not you
will need to get the psd repair software unless you have the psd file backed up
at different location. For this you can
use a psd repair software as Photoshop Recovery Toolbox. http://www.oemailrecovery.com/photoshop_recovery.html