Flashing will erase all user data . Ensure you have backed up your photos and contacts. Flashing Steps

Use the CSC_*** file to do a clean wipe, or HOME_CSC_*** to attempt to keep data (though a clean wipe is recommended for fixing bootloops).

(A desktop tool to download firmware directly from Samsung servers)

For the Samsung Galaxy J3 Prime (SM-J327T) Go to product viewer dialog for this item.

Installed on your PC so the device is recognized in Download Mode.