Can personal data be completely erased by restoring factory settings? How can I completely delete the files in my old mobile phone?

Restoring the factory settings can usually erase most of the personal data on the device, but it is not always possible to completely delete all the data. Specifically, restoring the factory settings will usually restore the equipment to the factory state, that is, clear all the data and settings stored by the user on the equipment. However, some data may still exist on the device, such as system logs and software update files.

In addition, some devices (such as hard disks) may also contain damaged sectors, which may contain data fragments that have not been completely erased. Therefore, in some cases, even if the factory settings are restored, these data fragments can still be restored and read.

In order to ensure the safety of personal data, it is recommended to back up important data before restoring factory settings. If you need to completely delete all the data on the device, you can do it by securely erasing, formatting or using special data destruction software. In addition, if you want to dispose of old equipment, it is recommended to use the equipment destruction service provided by professional institutions to ensure the safe deletion of personal data.

Restore factory settings

To completely delete the files in the old mobile phone, you can adopt the following methods:

1. Backing up important data: Before deleting files of old mobile phones, people should first back up files and data that need to be kept to avoid accidentally deleting important information.

2. Restore factory settings: Restoring factory settings can erase most personal data on the device, but it is not always possible to completely delete all data. So we can restore the factory settings many times, and fill in some irrelevant data every time to overwrite the previously stored data to ensure that the data is completely deleted.

3. Data coverage: use third-party software to fill the memory of the mobile phone, including some irrelevant content, such as large files (such as movies and useless pictures). ). Then delete it. Doing so may overwrite the original information and make data recovery difficult. But this kind of report is not always completely reliable. If data 100% needs to be deleted safely, special data destruction software needs to be used.

4. Hardware destruction: If you don't want others to know any information about you, or need to dispose of old equipment, it is recommended to use the equipment destruction service provided by professional organizations to ensure the safe deletion of personal data. Some devices, such as hard disks, may contain damaged sectors, which may contain data fragments that have not been completely erased. Use the equipment destruction service provided by professional organizations to ensure that the information on the equipment is safely destroyed.

In short, in order to completely delete the files in the old mobile phone, we need various means to ensure that the data is completely deleted and prevent data leakage.