The Gtmedia V8 Finder requires a physical USB connection to update; it does not support Over-The-Air (OTA) updates.
Insert the drive into the V8 Finder while the device is powered off. Gtmedia V8 Finder Software Update
: Ensure your V8 Finder has at least 50% battery life. The Gtmedia V8 Finder requires a physical USB
Ensure the firmware file is named correctly and is in the root directory of a FAT32 USB drive. Gtmedia V8 Finder Software Update