SD - 19.5 MB/s
Internal - 109 MB/s!!!!
I think I need to move to internal
I use a 95 MB/s read/write microSD card and it is very fast, but I still think eMMC memory is faster. These premium microSD cards are used to record 4k video, therefore they need to be fast. Personally I prefer installing to eMMC rather than using a microSD card. I do that for testing purposes only, just to make sure everything works correctly before installing to eMMC.