These "increasers" are almost always scams that rely on the user's hope for a quick fix. Here is what actually happens under the surface and why you should avoid them:
Your data and security are worth more than fake promises.
These tools rely on a deceptive trick: they manipulate the file system to show an inflated capacity to the operating system. The software does not and cannot create new physical storage space. It only changes what Windows thinks is available.
Use tools like 7-Zip or WinRAR to shrink large files.
The promise of a is a technical impossibility designed to trap users into data loss or malware infections. There is no magic software that can rewrite the physical laws of flash memory.