FileCleaner at Mac App Store analyse

Help!!! My Mac word for a long time, the file is too much, how to save some space? You can use FileClean to help you find and delete them, free up disk space. 1.Quick locate and delete large files and disused files from your Mac. 2.Custom lookup rules to facilitate your operation. 3.The automatic classification function can facilitate you view the file. 4.Quick View function to avoid the error of your operating.