RAVPower RP-WD01 for Android - Manual (Page 10)

21. How to copy the pictures on My SD card to my hard drive?
1> Insert SD card and hard drive into the FileHub at the same time. And you can find two
folders on “My FileHub”
2> Choose the files you want to copy by “Manage”. Click “Download” on the bottom,
choose the folders on your USB hard drive and confirm.