Generally speaking,most of people who use Android phone worry about their private data would be revealed and stealed by other people after they sell their Android or deleted data . Therefore, we have to choose Android Cleaner to clean or erase Android data /space , rather than factory reset or removed manually, only use cleaner tool to remove all the data, in this way ,we can ensure that any recovery tool can not restore them on Android phone ,at the same time , it can free up Android space or optimization of Android phone,
You can have a look the detailed tutorial below [b]clean Android[/b] phone for 3 steps.
Step 1: Run the software and connect your Android to computer with USB cable.
Step 2: Scan your phone after you choose clean from Android devices mode.
Step 3: Preview and start to remove data .
The Android Cleaner is the best tool to cleaner Android space or data , there are some Android data eraser software in the market, but few can be completely and permanently delete the data on Android, even if data has been cleared, some professional Android data recovery software can recover them later.
Read more: Delete Personal Data and Settings on Android
Permanently Delete Android data Before selling
More information:
How to erase Android messages without recovered ,
How to erase Android photos completely
How to delete Android contacts permanently