If you read the rest of the posts in the link provided above it tells you how to do it..

I've done this for some time now, not really to get performance or save space, but just because I could.
I have had no problem in doing so.
One of the responses on the forum provided in the link kind of made sense when he said that doing so would decrease the amount of space used on the Hard drive, thus allowing the read head of the drive to read more files, more quickly in a way...
Anyways, made sense to me...lol