How to delete app data?

In your app data folder theirs a folder called "Application Data" if you changed permissions to get access to it, or any upper level folder, you may have broken the Junction, and the folder will have multiple replicas of the app data folder. read more

Tap the types of data you'd like to delete. Tap Browsing History to delete the history of sites you visited. Tap Cookies, Site Data to delete website information stored on your device. Tap Cached Images and Files to delete data stored on your device that allows Chrome to open websites more quickly. read more

Yes and No. The files in this folder are user specific setting for install applications. They are not, as suggested below, core system file. The only thing you will hose is your own account. You can delete specific files to reset some applications setting, as the app will rebuilt it when it starts up. read more