First off, congratulations for having a great and very helpful Forum, I have been reading it for a long time and found it many times to be very useful and full of resources. Since this is my first post here, I hope this is the right Thread for this Topic. I am using an external Hard Drive with 2 partitions: One for Time Machine and the second for storing my Files on Windows and the Mac. After resizing the partitions several times trying to figure out the right size for each, reformatting and re-partitioning with Lion's native Disk Utility, I have noticed each time that the space was less and less without any Files on it, to the point that the total available capacity of the external Disk (and partitions accordingly) has now been reduced in almost 300 Mb compared to the first partition I did on it. I have been reading and looking for an explanation but can't seem to find neither a reason nor a solution for this problem. Does anyone know what is the reason for this and whether and How it can be restored to its original size of 1Tb? Any input appreciated, Thank you.