The GTN Xi Does Not Store Databases On the SD Card like The Original GTN

Unlike the original GTN™ navigator, all databases are stored internally in the GTN™ Xi. None of the databases reside in the SD Card. The databases are transferred into the internal memory, so no standard SD card is needed during flight as it can be removed after the database transfer is complete.

However, if you have a Flight Stream 510, it does need to stay in during flight in order to stream information with a portable.