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This is due to the fact that some files are themselves small and that others are already compressed the jpg file format is a compressed format. Well, if time is not an issue and you feel lazy, one way of uncompressing multiple files in a noncompressed folder — easily, is first compress the folder, then uncompress it applying changes to subfolders and files.
That only takes two steps instead of having to select all the compressed files. Am I wrong in the assumption that a compressed Windows file will automatically be decompressed on its next use? The reason I ask is why bother manually decompressing files if Windows needs to do it to run the file?
Yes, Windows does indeed, completely transparently, decompress and then recompress, any compressed file that is called up for use. If you alter the file and re-save it, the new version will automatically get recompressed as soon as you close the file. These files will not benefit from compression because they are compressed already , and actually stand a good chance of being made larger than they were to start with! On the other hand, BMP and WAV files can and should be compressed, because these are both uncompressed file formats that are both typically very large the former a picture file format, the latter a soundfile.
Two other things to note about Windows compression. Good third-party encryption tools, however, have their own compression algorithms and will compress your file before encrypting it, which not only makes the file smaller but actually improves the security of the encryption.
WinZip in particular is famous for this, and is highly regarded. It uses the AES encryption algorithm, and a heavy-duty compression. It should scarcely need saying that such files — being already compressed — should never be placed within a compressed folder, or otherwise marked for compression by Windows.
Thanks for the response, Leo and Glenn P. So, compressing a lot of files, especially on a less powerful PC could have performance consequences. I was aware Windows would need to decrompress a file to load it into memory and use it; I was not aware it would leave the saved file compressed on disc. But you failed to say how to turn off the compress option. Clear it if only some files are compressed, this may require more than one click and then click Apply.
I use a screen reader for computer access. It has to do with their usability as a sighted person. So you would have to enlarge it so much the picture would become blurry because the pixels were so big. Is this picture in my mind true? Any insight would be appreciated. It compresses only the size of the image file, for example, by combining duplicated bits and removing less significant data from the file. Thanks so much to everyone who posted advice. It turns out the answer is simple as was suggested, since I started compressing the disk with windows all I had to do was use windows with compress unchecked and the problem was solved.
On the disk, it consumes bytes, not only 30 bytes. Showing results for. Search instead for. Did you mean:. Last reply by lakehaven Unsolved. I did a Disk Cleanup including compressing old files. I wish now that I hadn't done it since I how have slow computer performance. When I did that the check box was already cleared. All forum topics Previous Topic Next Topic. Replies 5. Denny Denham 7 Thorium. The files are decompressed on the fly but only when they are used. I don't believe there is any way to decompress them separately, as System Restore does not alter data files.
Compressing an entire hard disk will exact a price in performance, though. To remove compression, according to this page do the following: "To uncompress a file or folder, simply reverse these steps and clear th Lakehaven, Click on Start Run. Table You can use multiple file names and wildcard characters.
Displays user help. The following are reasons to use this tool rather than the Windows Explorer equivalent: You can use Compact in a batch file.
If the system failed during compression or decompression when using Windows Explorer, the file or folder is marked as Compressed or Uncompressed, even if the operation did not complete.
The best solution is to remove unneeded files or increase hard drive space by adding another drive or replacing the drive with a larger one. You must be logged in to post a comment. Commands To Decompress Files On A Compresses Hard Drive You can uncompress all the files on a Hard Drive from the command line on a drive that has all files compressed or that had selected files compresses.
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