I am having a similar problem...
I had a 6 terabyte backup drive that I thought would last me quite a while...for file history...but it turns out file history is re-saving multiple versions of files that I have not touched or looked at in a long time...
Please Microsoft...the concept of file history is a good one...and I have used it to restore a couple of files to previous versions...but as it is right now I had to turn it off as my 6 terabyte NAS box was constantly being written too by file history...In a span of two months I have gone through 5.4 terabytes of backup space....mainly because of this bug with file history...
Please fix this...
Michael!