My portable DAW laptop is running out of room on the main partition. The partition is ~69GB and it is reporting 9GB left.

The strange thing is when I look at the individual folders on the drive, the sum total of data is about 14GB. The largest is my programs folder at about 11GB, 10 of which is Sonar.

I know that cluster size may come into play here. But, not to the tune of 55GB.

Anybody have any ideas what might be filling my drive?