Are you thinking of trading in your smartphone, or selling your tablet? Did you upgrade to a new device and are now considering giving your old one to a friend or relative?
In all such cases, in order to protect your data, you need to know how to remove your data from the device in a way that the next user cannot restore your personal files. Simply deleting files does not do the job – there are tools that can easily recover your files; all “deleting files” does is mark the storage space used for the “deleted files” as available for other uses, but the files are not actually removed from your device until they are overwritten.
So how can you properly and securely wipe your device?
To learn how – please see my article in Inc. How To Wipe An Android Smartphone Or Tablet Before Selling It Or Trading It In