MATE continously accessing SD card

Fresh install. Little flash icon almost appears continously at the top right corner of desktop. Is it normal that mate continously read/write on the SD card? How to check what is accessing the card and what lifetime to be expected for the card? Thanks!

Ok sorry, i see that its not showing SD card access instead the flash icon is related to problem with the power supply. Seems the power supply is not enough to drive the pi and the LCD display together.