Greetings. I am running Win XP Pro SP2 and have a 250GB Western Digital HD (model# wd2500b015-rnn) connected through a USB 2.0 port. Recently, I deleted a large (~60GB) Acronis Image Maker 8.0 file from this drive. Now, the amount of free space that is reported by Windows is understated by ~60BG. Booting into an Acronis Image Maker 8 boot disk and comparing the amount of unused space reported under the boot disk with the amount reported under Windows, yields identical results (i.e., the amount of free space reported is understated by 60GB in both cases). Emptying the recycle bin does not solve the problem. There are no hidden or system files on the drive that are visible to windows. Moving my data to another drive and then reformatting the drive is a solution that has worked for me when the problem occurred about a month ago, but, obviously this is not an efficient solution because the problem has a tendency to recur, albeit sporadically. I have contacted Western Digital and they have told me that I have a software problem and that they cannot help me. Any advice on how to fix this issue would be greatly appreciated. Thanks in advance for your suggestions.