Karen's Disk Slack Checker

Karen's Disk Slack Checker - Download now

Because of the way Windows allocates disk space, almost every file is given more disk space than it needs. This extra space is sometimes called "slack". In most cases, the amount of slack, or wasted, space increases with drive size, especially when the drive is formatted with the FAT16 filesystem.

How much of your disk space is being wasted? Karen's Disk Slack Checker will let you know. You'll also discover which filesystem is used on each of your drives, and the drive's "cluster size", or smallest unit of disk space allocation.