Hi, I can't help you with the first statement however I can help with how to copy a file to a flash drive. There are several steps.
1. Open Real play video library where your files are keep.
2 Go to the video you want to copy to the flash drive
3. Insert your flash drive into your computer
4. Next go to the file/video you want to copy and put your cursor on the file
Right Click on it
5. A MEMU file opens go to LOCATE FILE and Left click on that line
6. Your videos panel opens but the one you want is highlighted
7. Right click on that video another MEMU opens
8. Go to SEND TO and put your cursor on that line another Memu opens
9. Find your flash drive location from the list and select it.
10. Your video file should copy to your flash drive.
I hope this help