Your setup is fine.You only need to add an addtional step:
1.In yr external HDD create a directory DCIM.... For test purposes, add some photos in there
2. Create another folder /DCIM/100VIDEO if you wish to transfer videos to your iPad. For test puposes add a mov or avi or mp4 inside
3. I assume your term "self-powered USB.." means it has an external power source to run yr external HDD
4. Fire up yr iPad..camera roll will auto detect yr photos & videos followed by a prompt if you would like to import same to yr iPad.
You can also see yr ext HDD mounted in iFile...there you can copy paste... ie invoices pdfs to the appropriate folder etc
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1.In yr external HDD create a directory DCIM.... For test purposes, add some photos in there
2. Create another folder /DCIM/100VIDEO if you wish to transfer videos to your iPad. For test puposes add a mov or avi or mp4 inside
3. I assume your term "self-powered USB.." means it has an external power source to run yr external HDD
4. Fire up yr iPad..camera roll will auto detect yr photos & videos followed by a prompt if you would like to import same to yr iPad.
You can also see yr ext HDD mounted in iFile...there you can copy paste... ie invoices pdfs to the appropriate folder etc