While GPARTED would be fine to look at this (no tutorial on its use as the web tells all) you must also be aware that this is 160 BILLION BYTES and not 160 GB. Be sure to know how the math works.
I have a HP Pavilion DV6700 laptop with a 160GB hard drive, running Vista Home Premium SP 2. I received a message that the disk was getting full. When I check in explorer by right clicking Computer and selecting properties I see: Local Disk (C) 2.61 GB free of 100 GB and HP_RECOVERY (D) 1.98 GB free of 11.6 GB. I have also run the freeware WINDIRSTAT and SPACESNIFFER and both of those programs confirm the amount of disk space reported in Explorer. My question is: I expect the sum of (C) and (D) to be close to 160GB, but I am only seeing a total of 111.6 GB; what happened to my remaining 48 GB and how can I get it back?