[Bug-ddrescue] Outfile destination size

[Mateo Leyba]

I have a 500G drive that contained aprox 320G of data that dumped on me, I
am recovering to a 1T drive that had 800G avail on it. Everything was going
well but my copy stopped over the weekend with a No space let on device
error, my image so far is approx 800G. This is confusing me, how is my image
copy larger than the original disk? I just dumped the extra stuff on the
recovery destination to give me the full 1T and resumed the copy and it's
back at it, but I obviously did not allow myself enough room for the
recovery, how much space do I really need and can I resume this on yet
another drive if space runs out again without starting over?

Thanks for any suggestions
mateo