Most YG300 sellers on Amazon or AliExpress will send you a direct Google Drive or Mega.nz link to the firmware if you message them with your order number. Common Firmware Download Resources
If all links are dead:
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: yg300 firmware link
Ensure the USB is FAT32 and the file is in the main folder. Most YG300 sellers on Amazon or AliExpress will