Beware of the conversion program unless you set it up first. If you just convert with the default parameters, you could wind up with 512 or 1k size cluster dependent on the size of your hard drive. I had that happen to me and PC Pitstop gave me low marks on drive performance. I move all the files to another drive, reformated and it immediately changed to 4k clusters. This improved performance greatly. I don't have the information but I believe I read it here, but there is a procedure for setting up your MFT and cluster size prior to converting.