On this web page, you will see that the official hyperlink to Download Samsung SM -G313HU Stock Firmware ROM (flash file) in your Computer. The firmware is available in a zipper bundle, which accommodates Flash File, Flash Tool, Driver and How-to Manual.
Samsung SM – G313HU Stock Firmware (flash file)
The Flash File will enable you to to Upgrade, Downgrade, or re-install the Stock Firmware (OS) in your Mobile Device. The Flash File (ROM) additionally lets you restore the Mobile system, whether it is going through any Software Issue, Bootloop Issue, IMEI Issue, or Dead Issue.
File Name: G313HUXXU0AOA3_G313HUODD0AOA1_INS.zip
File Size: 535 MB
Android Version: 4.4.2
Flash Tool: Odin Downloader
How to Flash (set up): Follow Tutorial