Yes I can fread them on my laptop and in a htc m8 phone
just not in the tab 4 or my Samsung note 2 mobile phone ... neither of them will recognise the sd card at all .. so cant format them or mount them in the device
how would I find that out please
Yes it is FAT32
I have a variety.
sandisk 4 gb x 2
unknown make 128gb x 2
so what will I need to do for that.... take it back to the vendor and get a repair