Flashing the userdata file is a desperate but effective fix for several software issues:
The OPPO A37 series, first introduced in 2016, offered a blend of compact design and reliable performance. Understanding its core specifications is the first step to managing your user data effectively. oppo a37m userdata
If the device is locked, you must use hardware buttons to wipe the data: the Oppo A37m. Flashing the userdata file is a desperate but
: Copy this backup file to a PC or external SD card before performing any operations on the userdata partition. : Copy this backup file to a PC
These terms are often used interchangeably. Both will wipe the userdata partition, restoring the phone to its original factory state. A "hard reset" usually refers to the method of doing this via the (using hardware buttons), while a "factory reset" is the term used for the option found within the Settings menu.
This guide covers both aspects to ensure you have the information you need.