NTFS

Transparently compress your files

What does it even mean to transparently compress your files? Well, it means your files are stored in a compressed form on your hard drive, but any application can open it as normal. You can save some space (or a lot of space, depending on the contents of the file) and still continue using the file without worrying about zipping it and unzipping it each time since this feature is at the file-system level.
This only works on NTFS partitions that are configured a certain way-don’t worry,

unless you messed about with allocation unit sizes while formatting, this will work.
1. Right-click the file/ folder you want to compress and click properties
2. Here in the attributes section you will find a button labeled “Advanced”;
    click on it.
3. Under the “Compress or Encrypt attributes” section, click on the checkbox
     labeled “Compress contents to save disk space”.
4. Click OK twice and you will see a progress report for compressing the files.

Windows will now automatically compress this file while saving and decompress it while opening, so the application you use need not know that it is even compressed.

This works best for uncompressed text files. JPEG/PNG photos and even documents such as docx already compressed and won’t compress more.