How can I play DSC file on my mac pc?
How to play a DSC file on my mac pc?
iMac, Mac OS X (10.2.x)
That is a Nikon Disk identification File. I believe you need FCP 7 to read or edit that, but see also this:
http://www.brorsoft.com/how-to/edit-dsc-hx30v-avchd-fcp7.html