Sync never ends on Ankidroid

Today my new Galaxy Tab arrived and I spent a total of two and a half hours trying to synchronize the media stored on Ankiweb. All for nothing bc Ankidroid closes and the sync starts all over again. And even before it closed it was like 10Kb up 800000Kb down. Can I break the process into pieces so I don’t have to sync it all at once? What can I do?