"Unabel To Format Card"

Please help i have a 64gb Sandisk ultra 85mb/s

Unabel to format 

Unabel to delete files

After delete files come back again !!!


It would help to know how you attempted to format the card.

The card was purchased 10/7/2017
With the s7 edge device, the card is installed in the device and I have no output from the machine. I can not copy or scan. The files are allowed to come again. I can not scan the images on the card. Maybe I do not know what the reason. I can not erase the files or the memory chip. or formattted sd card