Corrupted files ?

Hi,

I can't open my .psdc anymore, with no reason. this morning I have this error, I press ok like 100 times, at the end the loading ended but nothing appear on screen.

so I try to made a previous version restoration, but it do not change anything. still continuing having this message.

on top of that I can't  export for backup because it seem a too heavy file (4go psd file)

I'm stuck?

Thanks