my bitcoin folder seems about 5-10 GB left, or 10 GB left on block folders to 500 GB hits, maybe not a week or a couple of days we can reach that (500 GB) number, so if you here have an exact calculate it, when it happens?
As far as I know, block data varies a bit (because of orphaned transactions). That's why your
blk03436.dat is different than mine, you can't just exchange them.