> For some reason, when I right-click "C:" in Win95 Explorer, the "Used
> Space" is somewhere in the 685 MB region. However, when I select all files
> and folders on C: and check their properties, the total size is about 418
> MB. What is wrong? Or better: which is right? I have the system show
> files, but still, it makes no sense. Many thanks beforehand,
> Marc van Doornik - The Netherlands
> Posted via CNET Help.com
Both are right - the disk properties in explorer show the space
corresponding to the number of clusters (allocation units) used. The sum of
all files and folders simply shows the sum of the file sizes. If you
right-click on a file in explorer, and click "properties", you'll see two
figures, file size and bytes used. it's the latter which shows how much
actual disk space the file occupies.
For example, a 1Gb FAT16 partition on my PC has a 16K cluster size, so a 1
byte file occupies 16K of disk space. On my 3.7Gb FAT32 partition, the same
file would occupy only 2K, as that is the cluster size.
The difference between (sum of all files in bytes) and (no. of clusters used
by files) is known as "slack", and shows how space-efficient your drives
are. FAT16 is inherently less space-efficient than FAT32 or NTFS.