I have a doubt related to synchronization. I’ve been using the AnkiDroid since 5 years ago, and I have more than 3000 cards on my Anki. I’d to save these cards on my account Anki, but I have fear click in something wrong and lose all I have done. What should I do? Tap on Synchronization and then Upload?
From AnkiDroid you should tap to sync uploading your collection to Ankiweb. Keep in mind you also have the automatic backup files if annthing might occur.