Working on a system recently, I noticed that its 20 GB primary partition was low on disc space. There was nothing immediately obvious as to the cause, so I broke out the windirstat utility. This gives a visual representation of the filesystem, using different sized blocks to identify large files, and color codes each file to show the data type. This great utility immediately pointed out some large files with the .msp extension that were taking up 5GB of space on the disk. Continue reading “.msp files eating up my disc space!”