Hi, I'm John! I will help you with this.
Does the flash drive work before on this computer?
Also, does it work on another PC or device?
Please also try:
- Plugging it into a different USB port
- Checking if it appears in File Explorer > This PC
- Press Windows key + X > Disk Management and see if the flash drive appears there
Are you getting any error message when connecting it?
Click "Add comment" to let me know.