You will notice immediately that searching "YG300 firmware link" brings up sketchy forum posts, dead Rapidgator links, and YouTube videos with links to suspicious file hosts. There are three main reasons for this:
There is for YG300 firmware. Why? The YG300 label is used by multiple OEM factories in China. Each batch may use different chipsets (Rockchip, Allwinner, or MediaTek). yg300 firmware link
Most "firmware links" found online for this device are community-driven or hosted on third-party forums. Below is a summary of the typical content and procedures associated with these links: Common Firmware Content You will notice immediately that searching "YG300 firmware