micro SD card


Hey folks!
Just a little ask if you please.
As the H5.2S can take the aforementioned card, does anyone have any pointers as to what class and particular brand of card to use or is generic gear the way to go?
Am probably going to try run the main HDD for recordings and such like and the sd card for timeshift, epg and so on...unless of course the sd card is decent enough to use as the main drive-but am assuming the alloted 128Gb maximum would not be that sufficient in the long run for this?
Your opinions and assistance is, as always, appreciated. Thanks and regards.