Mobile devices are getting ever more complex and similar to computers. The downside to this is that they fall prey to the same problems like lack of hard drive space and junk files. SD Maid - System Cleaning Tool is a free utility for that very problem packed with features that remove superfluous files let you browse your file system easily and manage your apps. You can detect files that are no longer needed analyse your storage situation and remove apps down to the last file. This is great if you?ve had your device a long time these files build up.