When SanDisk announced a 200GB microSD card in 2015, it showed how quickly removable storage capacity was growing inside a format small enough for phones and cameras. The announcement was a product milestone of its time, not a recommendation to buy that specific card today. Card models, speed ratings, device limits and prices change, so shoppers should treat the old capacity figure as historical context.
How the card reached 200GB
SanDisk’s Ultra microSDXC card used the microSDXC format, which supports capacities above the older microSDHC range. Capacity is only one part of a memory card’s specification. A device must support the card format and capacity, while speed classes communicate minimum performance characteristics for supported workloads. Marketing read-speed claims are not the same as a guaranteed sustained write speed, which matters for long video recordings, burst photography and some app workloads.
Compatibility still comes first
Before buying a card, check the device maker’s documentation for supported formats and maximum capacity. A card can physically fit and still be unsupported by an older phone, camera or tablet. Also check whether the device can use a card for portable file storage, app storage or both; those options differ by operating system and manufacturer. Formatting a card in a device may erase existing files, so copy important data elsewhere first.

What to compare today
For a current purchase, match the card to the job. A camera recording high-bitrate video may need a suitable video speed class and sustained write performance. A phone used mainly for photos may benefit more from capacity and a reliable backup routine. Buy from a reputable retailer, keep the receipt and be cautious of unusually cheap cards that claim very large capacities. Test a new card before trusting it with one-of-a-kind files.
The 200GB announcement captures a moment in storage history, while today’s SanDisk product lineup includes capacities and performance labels that differ from the 2015 model. Verify the exact model number and its current data sheet before purchase. Never rely on an old article’s price, speed or compatibility details as if they still apply.
Official references: SanDisk: current Ultra microSD UHS-I data sheet · SD Association: SD card capacity standards