1. Wind deer stat. It may not be one of the most beautiful tools, but is definitely one of the most reliable disk analyzers you'll ever find. Wind deer stat is a fast analyzer tool that has three default panels to show you information about your hard disk space. Below you will see a trimap of the data shown in bars of varying size based on their actual size on the hard drive. It makes it very easy to see which type of files are taking the most space. There is a column on the right listing all the file types along with a trimap bar color to quickly find them in the trimap. And of course, there is a fully intractable file explorer section where you can skim through your data and delete, move and manage it as you please. 2. Disk Savvy. Disk Savvy is a highly advanced disk analysis tool that offers great customization options while still being easy to use. Its free version is more than enough for regular users, but if you want to scan TBs of data and require advanced features like network drive support or command line support, then you'll have to upgrade to the paid versions. Although it only shows data along with its size, it has a special filters section that lets you see data using handy categorize. Some of these categories include, by extension, modification time, access time, creation time, user name a few more. You can also use pie and bar charts, but they aren't interactive. 3. Space Sniffer. It has an interactive interface that makes it very easy to differentiate between files, folders and installable programs. I really like its touch of animations that make the program look cool, but at the same time help visually pinpoint data easily. All the data is shown as titles with the name of file or folder written on it. You can double click on each title to dig deeper and look for large files. You can export the data to a file and also scan external storage devices. I also really liked its more detail feature that shows you more details about a selected drive as you click on it. 4. Tree Size. Tree Size has both free and paid versions, but the free version works great if you want something quick and simple. If you are not a fan of tiles, charts or tree maps, then Tree Size free version will definitely attract you. It simply shows all the folders and files in your drive along with their size written next to them. The data is also arranged from big files to small, so you can easily pinpoint the culprit. Its paid version for personal use shows 3D charts and tree maps for proper illustration and you it can even pinpoint duplicate files. If you are interested in scanning network drives and servers as well, then you'll need Tree Size Professional version. 5. Get folder size. Get folder size is a bit similar to Tree Size free version as it also only shows folders and their size on the hard drive. However, it comes with additional tools as well that you may find interesting. Apart from the folders panel, there is another panel that lets you see only the files inside the selected folder. Additionally, results in both of the panels can be filtered just by entering file extension or name of the files, folders.