If your purchased phone shows less than 50GB of available memory, please restore your OPPO A83 to factory settings and select to format the storage space:

Backup Important Data

: Before proceeding, back up important data such as photos, contacts, and messages.

Access Settings

: Open the Settings app on your phone.

Navigate to "System & Updates"

: Find and select the "System & Updates" option in the Settings menu.

Choose "Reset" or "Backup & Reset"

: In the "System & Updates" menu, locate and select the "Reset" or "Backup & Reset" option.

Select "Factory Reset"

: Within the "Reset" or "Backup & Reset" menu, choose "Factory Reset."

Confirm and Reset

: The system will prompt you to confirm whether you want to perform a factory reset. Note that this action will delete all data on your phone. If you're sure, click "Reset Phone" or a similar option.

Format Storage Space

: During the factory reset process, you will be asked if you want to format the storage space. Make sure to select this option to format the storage space.

Wait for Reset

: Your phone will begin the reset process, which may take some time. Please wait patiently for the process to complete.

Set up Your Phone Again

: Once the reset is complete, your phone will restart and return to its initial setup state. Follow the on-screen instructions to set up your phone again.

After completing these steps, your OPPO A83 will be restored to factory settings, and the storage space will be formatted. This should resolve the issue of less than 50GB of available memory on your phone.