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ajdratch asked on

Less free space when compressing files and folders

I have a server that has under 1 gig free space on the C drive. When I compress files, I end up with less free space, not more. I've tested compressing different folders and get the same results.

I started with 842 MB free space on the C drive. I compressed a folder that was 784 MB. After compressing it I had 139 MB free space. The statics on the compressed folder showed size = 784 MB and size on disk = 522 MB. I should have gained over 200 MB. When I uncompress the folder, I have the 842 MB free again.

I tested compressing the D drive and got the same results.
Windows Server 2003

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8/22/2022 - Mon

Can you just clarify what your actual question is? Are you after a reason why you're losing disk space instead of gaining it, or looking for someone to give you ideas on other ways to free up some more space?



I want to know why I am losing space. I want to be able to compress files and gain space

If it is the former, the only possible thing I can think of is that whatever compression tool you're using is creating some kind of (possibly temporary?) copy of the files your compressing...

If you take a number, say 1Gb, compress it, and the resulting file size is say 500Mb, and yet somehow along the way you've actually LOST total disk space, it seems the only feasible reason is some kind of temp file created during compression.

Out of interest, (this probably isn't possible if this is a live server) have you tried compressing a couple of things, then reboot the server and see what the disk space available shows as after the reboot?
Your help has saved me hundreds of hours of internet surfing.

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