Please be advised that Thinkware memory cards are highly recommended as it is the only brand that is guaranteed to be compatible with our dashcams.
Even though non-Thinkware brand memory card meet the microSD card requirements, each manufacturer uses slightly different file settings and systems that varies between batches. As such we cannot guarantee the performance or recommend non-Thinkware brand memory cards with our products.
The X550 has a Capacity of 64GB.
Please check out these links for memory card recommendations: