MXL302CMH, thank you for reaching out to us. I know how important it is to have enough memory on your device and tikibar1 is correct. The Galaxy S7 has an Expandable Memory for up to 256GB. If you need additional help please visit our support page. http://vz.to/1s96X1K
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I see the answer was 256 GB. What I find is whether it is exFAT or FAT32, the Samsung Galaxy S7, with Android 8.0 has an limit of 32GB. I can load up the SD card from my PC with either format, and soon as it is put in the S7, it throws all the memory away till it gets below 32 GB. Solutions to get access to the entire card?