"Destination folder access denied" on a partition on MacBook Pro from Windows 8
Windows cannot write to Apple Journaled partitions.  OS X cannot write to NTFS. So you'll need to choose something FAT-based.

There are third-party solutions to allow writing of course but I've never found the performance hit to be worth versus just going with FAT.

Note that doing three partitions with Bootcamp can be tricky. I recommend so research on that subject.