mlsmsw wrote:... What is Mass Storage Camera....
MassStorageCamera.app is a system application used by OS X. It is not intended to be used independently by users. In Mac OS X 10.9, the app is located in ./System/Library/ Image Capture/Devices. (I no longer have any OS X 10.8 Macs to check the location in 10.8.x.)
Unless you are an OS X expert, I strongly suggest you let Mac take care of it rather than you manipulating it manually in any way.
You can read more about MassStorageCamera issues in this search of Apple Discussions.
mlsmsw wrote: ... why was it running?
Because something was wrong.
My suggestions for a fix is to stop the process as you did, then restart your Mac.
Keeping your Mac software up to date and occasionally restarting Mac should keep the problem under control.
Message was edited by: EZ Jim
Mac OSX 10.9