@DoctorGTesting,@Pathduck , After several more attempts to get the Vivaldi instance on my Android device synced to my new Linux laptop, it finally works! I got an account credentials verification sent to my recovery email, confirming my username. I made sure the tablet was open and Vivaldi sync was active. I uninstalled the Vivaldi app on the new laptop and reinstalled it. I opened the browser and skipped through the welcome pages until I came to a login button. I went to sync settings and chose to sync all data. I was immediately shown that downloads and uploads were synced. Now, on the homepage, clicking on the sidebar icons shows my entries from the other computers. I don't know what I did this time that was different. I thought this was what I did before. I guess that since the only other devices I have that are still working are mobiles, all my feed subscriptions are gone, but other than that everything seems to be working. Thank you for your replies.
