Reason #1 why you DO NOT enable windows drive compression: uncompressing.
Just to leave this entry not so cryptic…
Windows compression is definitely not the way to go in any scenario. Between the speed hit, the little space you actually get, and how cheap hard drive space is now, there is no reason to use it.
Oh, did I mention how long it takes to uncompress a drive?
Why would one need to decompress?
Mainly to improve performance. However, in my case, a) there was need to compress in the first place as there was plenty of space and b) for speed concerns.