file corruption

I was working on a Music video last night and i had everything set correctly. I left to go to baskin robbins but then when i came back and put in all the other clips (I had saved it and closed it before i left then i opened) and saved it, exactly when it goes to the clips i put in after I went...

I'm planning to partition my current Hard Drive, yet this could be the first time to partition my currently use HD(yet I did pration before but before I install OS, yet this is my second reformated drive cuz by OS conflicts & I forgot to make two partitions). Yet I just want to know if it's...