Flashing will completely wipe the internal storage. Back up all essential photos, documents, and app data.
Download the specific standard or custom firmware version (usually an .img file) matching your hardware revision. sanei a76 tablet android flash download portable
While continuing to hold that button, plug the USB cable into the tablet. Flashing will completely wipe the internal storage
If your PC does not recognize the tablet, try using a different USB port (preferably on the back of the motherboard if using a desktop), or swap the USB cable. or swap the USB cable.