NTFS really saves disk space than FAT32

Recently, I used everything to index disk files. Since everything only supports NTFS-format disks, I was surprised after converting drive C from FAT32 to NTFS: my c disk is 30 GB, the remaining space is about GB before conversion, and the remaining space is about GB after conversion.

Everything, this is a good tool :( The following excerpt from the http://xbeta.info/everything-search-tool.htm)

Everything is a file search tool developed by voidtools (Chinese homepage). It is described on the official website as "locate files and folders by name instantly )". It is small in size, simple and easy to use on the interface, fast indexing, fast search, occupies extremely low system resources, tracks file changes in real time, and shares search via HTTP or FTP.

-Only search for file names, not for file content;
-Only applies to NTFS file systems, not FAT32;
-Perfect support for Chinese characters, but v1.2.x and later must be used.

The biggest advantage of the Everything search tool is speed. The speed is not fast, it is extremely fast; the user is not satisfied, but shocked.

The first is the index speed. According to the official website, 1 million files can be indexed in one minute. My NTFS file system has a total of 40 Gb/nearly 40 thousand files. When I started it for the first time, I didn't feel it takes time to create an index. This is fast because the everything index does not need to scan hard disk files one by one, but directly reads the USN logs of the NTFS file system. This is, of course, both effort-saving and reasonable.

The second is the search speed. After you type a character in the search box, the search result, perhaps more accurate, is displayed in real time.

The operating principle of everything is based on the NTFS file system. The USN log in the NTFS file system records all the changes the system has made to the files in the NTFS partition. For each volume, NTFS uses the USN log to track information about the files to be added, deleted, and modified. Everything uses USN for file search, which is extremely fast.