Originally Posted by cyaclone
Samsung S5 Manual does not indicate the type of microSD card.
Which does it take a 64 gb microSDHC a 64gb microSDxC?
or does it take either?
Is it the same for the 128gb card also?
There are no 64 GB SDHC cards, so that should answer your question right there.
The S5 will accept 128 GB cards, ergo it can use either SDXC or SDHC.
In all truth, the SD Association nomenclature is Byzantine. SDHC cards have a maximum capacity of 32 GB. SDXC cards have data transfer protocol refinements and a theoretical max capacity of 2 TB. More important is the speed class rating
You'll want a micro SD card that is at least Class 10 (10 Mbps).
Better would be a UHS Class 1 (10 Mbps).or UHS Class 3 (30 Mbps) rating.
For maximum performance or If 4K video is important to you,
look for a name brand, micro SD SDXC UHS, Class 3+ (30 Mbps) card.
And only the gods know if the latest UHS-II cards are usable in the S5 or not.