Plug the USB drive into the unit's primary USB port (usually labeled "USB 1" or "OTG").

Contact the seller from whom you purchased the device (e.g., via AliExpress or eBay). They often provide private Dropbox or Google Drive links for the latest stable build.

If your system is boot-looping and you cannot access the settings menu: Insert the prepared USB drive. Use a paperclip to press and hold the button.