I need to change the cluster size on my FAT32 500gb external hard drive from 64kb to 32kb without formatting. I've already got 199gb of stuff on there, and I DO NOT want to lose it all. I can't move it to my computer either because there's not enough space. I've already tried the free versions of acronis and minitool, and you have to pay for those programs to change the cluster size. Anybody know how I can do this for free?