Windows 10: Specific folders keep getting automatically compressed even after I decompress them

I noticed a few days ago that the "two blue arrows" appeared on all the icons on my desktop, which I found out stand for NTFS compressed files. I then checked the whole C drive and noticed that a few folders, namely "Documents", "Desktop" and "AppData" (all in my user's folder), were also compressed. I thought that that was odd, because I was pretty sure those folders weren't compressed before. I also noticed that my drive had more free space than some days before (a few GB).


I then decompressed some (not all) of the files and sub-folders in those three folders. However, I found out today that all the three folders are now entirely compressed, again, even the files I decompressed and that I definitely did not compress myself.


I'm not sure if this is relevant, but I keep my drive almost full (about 10 GB free on a 256 GB SSD), and this has been so for more than a year. However, this is the first time I experienced this issue with compression. Could it be that Windows is automatically compressing these folders to make space (I'm running Windows 10 Pro version 1803)?


Thank you in advance.

:)

 

Files in C: drive automatically compressing?

Hi Marvin,

You can set the compression state of folders and compress or decompress files by using My Computer or a command-line program called Compact. We recommend following these steps to set a folder in a decompression state:

• 
  Start Windows Explorer . In the left pane, select the folder you want to compress or decompress.
  
• 
  On the File menu, click Properties to display the
  Properties dialog box.
  
• 
  On the General tab, click Advanced .
  
• 
  In the Advanced Attributes dialog box, clear the Compress contents to save disk space check box, and then click
  OK .
  
• 
  In the Properties dialog box, click OK .
  
• 
  To keep existing files or subfolders in the NTFS folders in their current compression state, click
  Apply changes to this folder only , and then click OK .
  

Let us know if you need further help.

 

Files in C: drive automatically compressing?

As you may already know, if this feature is on, every new folder/file you add starts off automatically compressed. If you would like to turn it off for the whole drive, kindly follow these steps:

• Start File Explorer . In the left pane, right-click on the drive that you would not want to be compressed.
• Click Properties.
• Make sure that the Compress this drive to save disk space box is unchecked.
• Click OK then Apply.

Let us know if you need further assistance.

 

COMPRESSING Drives

i remember it from a course i took, which made me go and format my HDD's to a 64K cluster size... which then made XP impossible to install due to service pack 2 cracking the shits about not being able to compress its uninstaller.

its half related, but its WHY i remember it.


will google for details now


ding, found it


http://support.microsoft.com/kb/307987

underline my emphasis



more
http://support.microsoft.com/kb/251186/EN-US/

it may be me interpreting it wrong, but it clearly sounds like its decompressing it to a file and not leaving it in memory