Short Bytes:Microsoft Windows has abilities to compress your hard drive. The compression works for the drives formatted using the NTFS file system and for folders resting on an NTFS drive. You can also use NTFS compression on a pen drive by formatting it to NTFS.
Shrinking files using NTFS compression will increase the workout done by your CPU while decompressing it. However, modern CPUs won’t give a sweat on this. Compressing the files won’t increase the access time. Instead, it may contribute lesser access time. This is because the files are first transferred to the RAM and then decompressed. A small-sized file could be transferred more quickly than a larger one.

An important point to be noted is that the compressions will only work for the stuff which can be compressed. This means that audio and video files, which are already compressed, won’t get shrunk considerably than the uncompressed ones like the word files and PDFs.
However, using NTFS compression on system files may not be beneficial to the health of your system. It may contribute to degradation in performance. It is not recommended to do so.

How To Compress Drive To Save Disk Space Using NTFS Compression?
The drive that needs to be compressed should be formatted to use the NTFS file system. External storage devices like USB drives are formatted using the FAT32 file system. So, you’ll have to reformat it in order to enable NTFS compression.
Here are the steps to enable NTFS compression in Windows:
Recommended:FAT32 vs. NTFS vs. exFAT – Difference Between Three File Systems
How to compress contents of a folder to save space?
Using NTFS compression to compress drives won’t drastically reduce your disk size. But it is good in the situations when you are out of space and want to store some important data, and also for keeping the files which you don’t use very often.
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