The YI Smart Dome X camera doesn't have any built-in internal storage. You will need to use a MicroSD card or subscribe to our cloud service for it to be able to record activities and save it.
The camera supports SD cards up to 128GB and requires cards that are class 10 or above.
There are different types of plans for the cloud-based on the type of videos being uploaded and the number of days they will be available for you to view them. Please refer to this link to learn more about our cloud plans: http://www.yitechnology.com/yi-cloud