T-Mobile support advises the S9 can accept up to a 400GB micro-SD card. That seems a peculiar number as they come in 128, 256 or 512GB but I’ve never seen a 400GB card. Samsung website says 512, but it may vary by country and carrier. Does anyone know if a US model SM-G960U can really handle a 512GB card?
Userlevel 7
+15
Personally, everything I tried over 256GB never worked for me. There are a couple of companies that do make some unusual size MicroSD cards though. XDA might be the best place to look for more information on this though.
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