After effect preflighting please i need help. I am trying to render a big project filr which has lots pre composse files in it. And it was taking  almost 2 days to hold on pre- flighting before rendering.  And then rendering for maybe 24 hours. I am using ailenware i7 with 32 ram. But now when added few more files  with the same project, now it cant render anymore....it always shows pre flighting.....please help if possible
I assume that after effects is creating its cache-files on the c-drive (which is the standard location if I recall correctly) and because there is near to no space left, it struggles to cache frames. The first thing you can do is go to edit -> purge everything and see if that helps. In any case, I highly advise you free up your c-drive - I'd feel comfortable with about 100-200gb of free space (at least)