i have a problem with my external hardisk. my hardisk have 500gb space, used space = 129gb, suppose free space = around 371gb. but the hardisk only have 200+mb free space.. i already scan for virus (avira 2013 licensed), but nothing comes up, and also i already check for disk error through disk scan, but no error found.. can someone help?
here's a picture for reference
here's a picture for reference