Hi Gleb,
I'm sorry for the slow response!
Are you using Mac app or iOS app?
Assuming you are using iOS app, the recommended way is to create your flashcards in an Excel spreadsheet. If you have pictures, then you'll create a column header "Picture 1" or "Picture 2" and put the picture file name in that column (not the picture itself). You then need to transfer both the Excel sheet and the pictures to the app together. If using my website, you'll copy-paste your Excel contents into the webpage, then zip up your pictures and upload that. A better way is to use OneDrive or Dropbox.
See the following video:
02 Creating flashcards outside of the app
https://www.youtube.com/watch?v=WG9lxMBws8kLet me know if this information helps.
You might want to email me for potentially better service, since I can sent better samples
Ernie
et@orangeorapple.com