Thanks a lot Hilmar, I'll check it out...

BR


>>Many thanks for you Hilmar,
>>
>>This was helpfull, let me tell you the problem, we use the D: partition 80GB to store our developed system image files (abour 150000 file),in addition to that we store more applications.
>>
>>When I display the D: partition propirites it shows the used capacity about 50GB, but when I select manualy all the folders in the same drive D:, and right click the mouse then select propirities it show the total number of files and show the used capacity about 35GB!!!
>>
>>So, where is the problem? do I have to compress the drive or something else is wrong?
>
>The answer is quite simple (I believe): cluster size. A file takes up one or more clusters, of 1/2, 1, 2 or 4 KB each. Let's assume, for the sake of the discussion, that your cluster size is 4 KB.
>
>A 1 KB file (or less!) will take up one cluster (4 KB). The remaining 3 KB are not available for other files - although Windows NT might have a few additional tricks which I don't know in detail.
>
>Similarly, a 5 KB file won't fit into a single cluster, so two clusters are used (that is, 8 KB).
>
>The problem here is that you have many small files. A few large files generate much less waste.
>
>Your options include:
>
>

Reduce the cluster size.
>

Save your data in a few large files, instead of many small files.
>

Compression would probably help, too.
>
>HTH, Hilmar.

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