1. Open Opera browser on your computer
2. Click ♡ icon in the left hand side:

3. Select 'Export Bookmarks' in the lower left corner:

3. Choose file location and click 'Save':

4. Then transfer HTML file to your phone/tablet via email/messenger
5. On your phone/tablet tap HTML file and choose Aloha browser from the list.
If HTML file opens in another browser, please set up Aloha as default browser.