📎 AI Summary:
The thread discusses whether it’s safe/effective to compress a Windows “recovery” drive that is nearly full. The main answer is that the recovery partition is intentionally kept small and should not be altered—no compression, adding, or removing content—because it exists solely to enable full system recovery after serious failures. Overall sentiment is cautionary and directive toward leaving the recovery drive untouched.
Thread Author
Side note: My recovery (E:) drive is 90 % full. Would it make any lick of difference to compress that drive?

The recovery drive intentionally has little space as it is not intended to be used beyond storing the recovery image. You should not do anything with that drive (compressing it, adding to or subtracting from its content or absolutely anything else). It's sole purpose is to enable full system recovery in the even of a serious system failure and you should leave it alone and intact.