NTFS File Compression

  Batch 15:22 31 Dec 2006

I've noticed that on my laptop (Xp-Pro), many of the OS and program files are compressed. None of the folders (immediately above the files or higher up) have comprssion turned on.

For example, most, but not all Acronis True Image files (in C:\Program Files\Acronis\True Image) are compressed.

Similarly, an application (that I wrote years ago) and installed manually (i.e. I created a folder and copied the .EXE across) is compressed.

Is there some default setting elsewhere in XP that causes this compression to occur??? By way of contrast, my other PC (XP-Home) has the same apps, but the files are not compressed!

  VoG II 15:24 31 Dec 2006

Running Disk Cleanup compresses files if that option is selected.

  Batch 15:33 31 Dec 2006

Hmmm! That might be it. I don't use the laptop very often and I see the (default?) setting is to compress if not used for 50 days.

I seem to recollect a long time ago that Disk Cleanup took a long time to run and was (probably) stuck on Compress Old Files.

I didn't realise that Compress Old Files meant literally ANY files not accessed (is that definitely the case?).

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