The U7 designation indicates a . This version is closely tied to the device's official software and security patch, commonly found on firmware running Android 9 (Pie) with security patches around late 2019 and later.
Use Odin3 v3.13.1 or newer to flash the .tar or .md5 file in the CP or Slot section.
Navigate to the tab in Odin. Ensure Auto Reboot and F. Reset Time are checked. Leave all other settings at default. Click the Start button at the bottom of the interface.