Prestigio PMP7079E QUAD Technical & Service Manual page 27

3. Press the " VOL+" or "VOL- " key to select the option "update rkimage from
/sdcard", and then press the "Power" key to confirm the upgrade process.
4. When completes, select "reboot system now" to reboot the device.
1. open RKBatchTool.exe ;
Firmware update guide (USB burn)