3. *(Optional)* download a [tool used to enable USB mass storage support on KOReader](https://www.mobileread.com/forums/attachment.php?attachmentid=171942&d=1560706352)
3. *(Optional)* download a [tool used to enable USB mass storage support on KOReader](https://www.mobileread.com/forums/attachment.php?attachmentid=171942&d=1560706352)