How to completely clear the residual folders after uninstalling mobile APP?

After the files and apps downloaded on the phone are uninstalled, there will be garbage left, and they will take up a lot of space. But how can we clear them out if we don’t know which ones are garbage?

Generally, junk cleaning software, such as 360 and Tencent Manager, can clear mobile phone cache, history, uninstall residual files, etc., but some files cannot be deleted. How to clear the mobile phone memory and delete useless folders?

Take Android phones as an example. Open the phone's file manager. There are many folders in the phone. Most of them are named in English. The folder named QQ is where the QQ software stores data and some plug-ins. This folder should not be touched because QQ itself provides a cache clearing function. There is no need to delete its folder. If you delete it and then try to use QQ, it will crash directly.

1. data: is the data folder, which is generally used to store system data. This is very important and cannot be deleted.
2. backups: backup files. If you don’t want to flash the phone or need to reinstall it in the future, it is recommended to delete them.
3. Bluetooth: Bluetooth data files, do not delete this.
4. LOST.DIR: Lost or erroneous files on the card will be moved here. This folder cannot be deleted.
5. Browser: The browser folder. If you still find this folder after uninstalling the browser, don’t hesitate to delete it directly.

In addition to the above, there are actually many other good software. For example, the storage space cleaning app, its biggest advantage is that it cleans very thoroughly. It can clean up spare files, regular cleanup, old files, installation packages, large files and other functions.